/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/popl20-more/mts.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:44:35,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:44:35,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:44:35,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:44:35,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:44:35,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:44:35,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:44:35,186 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 16:44:35,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:44:35,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:44:35,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:44:35,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:44:35,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:44:35,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:44:35,224 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:44:35,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:44:35,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:44:35,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:44:35,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:44:35,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:44:35,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:44:35,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:44:35,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:44:35,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:44:35,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:44:35,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:44:35,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:44:35,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:44:35,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:44:35,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:44:35,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:44:35,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:44:35,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:44:35,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:44:35,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:44:35,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:44:35,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:44:35,227 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:44:35,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:44:35,227 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:44:35,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:44:35,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:44:35,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:44:35,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:44:35,575 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:44:35,576 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:44:35,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl [2021-06-05 16:44:35,577 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl' [2021-06-05 16:44:35,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:44:35,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:44:35,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:44:35,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:44:35,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:44:35,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:44:35,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:44:35,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:44:35,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:44:35,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/1) ... [2021-06-05 16:44:35,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:44:35,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:44:35,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:44:35,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:44:35,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (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 16:44:35,728 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:44:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:44:35,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:44:35,729 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:44:35,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:44:35,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:44:35,730 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:44:35,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:44:35,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:44:35,730 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:44:35,732 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:44:35,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:44:35,732 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 16:44:35,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:44:35,930 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:44:35,931 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:44:35 BoogieIcfgContainer [2021-06-05 16:44:35,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:44:35,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:44:35,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:44:35,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:44:35,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:44:35" (1/2) ... [2021-06-05 16:44:35,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170af1cf and model type mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:44:35, skipping insertion in model container [2021-06-05 16:44:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:44:35" (2/2) ... [2021-06-05 16:44:35,938 INFO L111 eAbstractionObserver]: Analyzing ICFG mts.wvr.bpl [2021-06-05 16:44:35,943 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:44:35,943 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:44:35,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:44:35,944 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:44:35,978 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:44:36,019 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:44:36,050 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:44:36,050 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:44:36,050 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:44:36,050 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:44:36,050 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:44:36,050 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:44:36,051 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:44:36,051 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:44:36,058 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:44:36,079 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 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 16:44:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 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 16:44:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:44:36,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:36,092 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:36,092 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1113490327, now seen corresponding path program 1 times [2021-06-05 16:44:36,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:36,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116789055] [2021-06-05 16:44:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:36,298 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 16:44:36,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:36,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116789055] [2021-06-05 16:44:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116789055] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:44:36,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:44:36,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:44:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644103218] [2021-06-05 16:44:36,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:44:36,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:44:36,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:44:36,323 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 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) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:44:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:36,405 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-05 16:44:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:44:36,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 18 [2021-06-05 16:44:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:36,420 INFO L225 Difference]: With dead ends: 154 [2021-06-05 16:44:36,420 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 16:44:36,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:44:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 16:44:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-05 16:44:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:44:36,486 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-05 16:44:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:36,487 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:44:36,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:44:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:44:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:44:36,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:36,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:36,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:44:36,490 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:36,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2043191081, now seen corresponding path program 1 times [2021-06-05 16:44:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:36,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795143637] [2021-06-05 16:44:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:36,569 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 16:44:36,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:36,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795143637] [2021-06-05 16:44:36,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795143637] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:44:36,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:44:36,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:44:36,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245411802] [2021-06-05 16:44:36,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:44:36,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:44:36,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:44:36,576 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 16:44:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:36,619 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-05 16:44:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:44:36,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 20 [2021-06-05 16:44:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:36,624 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:44:36,624 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:44:36,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:44:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:44:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-05 16:44:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:44:36,650 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:44:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:36,650 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:44:36,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 16:44:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:44:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:44:36,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:36,654 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:36,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:44:36,655 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:36,655 INFO L82 PathProgramCache]: Analyzing trace with hash -219246905, now seen corresponding path program 1 times [2021-06-05 16:44:36,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:36,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071491302] [2021-06-05 16:44:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:37,124 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 16:44:37,269 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-06-05 16:44:37,303 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 16:44:37,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:37,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071491302] [2021-06-05 16:44:37,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071491302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:37,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613898893] [2021-06-05 16:44:37,304 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 16:44:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:37,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:44:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:37,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:37,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:37,901 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 20 treesize of output 14 [2021-06-05 16:44:37,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:37,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:37,912 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 25 treesize of output 17 [2021-06-05 16:44:37,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:37,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:37,929 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 27 treesize of output 19 [2021-06-05 16:44:37,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:37,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:37,935 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 32 treesize of output 22 [2021-06-05 16:44:37,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,006 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-06-05 16:44:38,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:44:38,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-05 16:44:38,066 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 16:44:38,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613898893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:38,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:38,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:44:38,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376754027] [2021-06-05 16:44:38,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:38,069 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:38,382 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:44:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:44:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:44:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:38,385 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:44:38,385 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:44:38,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:44:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:44:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:44:38,404 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:44:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:38,405 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:44:38,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:44:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:44:38,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:38,406 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:38,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 16:44:38,621 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:38,622 INFO L82 PathProgramCache]: Analyzing trace with hash -387055997, now seen corresponding path program 2 times [2021-06-05 16:44:38,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:38,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998278325] [2021-06-05 16:44:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:38,914 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 16:44:38,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:38,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998278325] [2021-06-05 16:44:38,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998278325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:38,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046443705] [2021-06-05 16:44:38,915 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 16:44:38,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:38,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:44:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:39,258 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:39,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:44:39,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:39,273 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:44:39,275 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 16:44:39,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:39,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:44:39,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:39,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:39,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 16:44:39,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:39,346 INFO L628 ElimStorePlain]: treesize reduction 49, result has 38.0 percent of original size [2021-06-05 16:44:39,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:44:39,353 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:31 [2021-06-05 16:44:39,433 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 16:44:39,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046443705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:39,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:39,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 16:44:39,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757761029] [2021-06-05 16:44:39,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:44:39,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:44:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:44:39,435 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:39,898 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 16:44:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:44:39,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:44:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:39,901 INFO L225 Difference]: With dead ends: 374 [2021-06-05 16:44:39,901 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 16:44:39,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 619.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:44:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 16:44:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 16:44:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:44:39,909 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:44:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:39,909 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:44:39,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:44:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:44:39,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:39,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:40,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:44:40,129 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash -88282549, now seen corresponding path program 3 times [2021-06-05 16:44:40,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:40,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997328481] [2021-06-05 16:44:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:40,356 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 16:44:40,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:40,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997328481] [2021-06-05 16:44:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997328481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:40,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330758412] [2021-06-05 16:44:40,357 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 16:44:40,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:44:40,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:40,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:44:40,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:40,625 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:40,625 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:44:40,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:40,633 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:44:40,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-06-05 16:44:40,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:40,685 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-06-05 16:44:40,688 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 11 treesize of output 7 [2021-06-05 16:44:40,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:40,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:40,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:44:40,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:27 [2021-06-05 16:44:40,787 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 16:44:40,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330758412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:40,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:40,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:44:40,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439868958] [2021-06-05 16:44:40,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:40,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:40,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:40,789 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:41,057 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 16:44:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:44:41,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:44:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:41,060 INFO L225 Difference]: With dead ends: 296 [2021-06-05 16:44:41,060 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 16:44:41,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:44:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 16:44:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 16:44:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:44:41,077 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:44:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:41,077 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:44:41,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:44:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:44:41,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:41,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:41,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:44:41,295 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1482543051, now seen corresponding path program 4 times [2021-06-05 16:44:41,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:41,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033076322] [2021-06-05 16:44:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:41,552 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 16:44:41,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:41,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033076322] [2021-06-05 16:44:41,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033076322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:41,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952450839] [2021-06-05 16:44:41,552 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 16:44:41,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:41,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:44:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:41,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:41,814 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:44:41,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:41,823 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:41,823 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 16:44:41,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:41,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:41,877 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:41,877 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:44:41,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:41,886 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:44:41,886 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 16:44:41,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:41,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:41,948 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 16:44:41,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:73 [2021-06-05 16:44:42,083 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 16:44:42,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952450839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:42,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:42,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:44:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665634158] [2021-06-05 16:44:42,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:42,084 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:42,428 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 16:44:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:44:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:44:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:42,432 INFO L225 Difference]: With dead ends: 425 [2021-06-05 16:44:42,433 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 16:44:42,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 16:44:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 16:44:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:44:42,447 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:44:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:42,448 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:44:42,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:44:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:42,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:42,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:42,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:42,672 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:42,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1258502875, now seen corresponding path program 5 times [2021-06-05 16:44:42,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:42,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005799036] [2021-06-05 16:44:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:42,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005799036] [2021-06-05 16:44:42,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005799036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094130622] [2021-06-05 16:44:42,716 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 16:44:42,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:44:42,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:42,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:42,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094130622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:42,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:42,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:44:42,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819230386] [2021-06-05 16:44:42,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:44:42,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:44:42,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:44:42,830 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:43,285 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:44:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:44:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:43,289 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:44:43,289 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:44:43,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:44:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:44:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:44:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:44:43,300 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:44:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:43,301 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:44:43,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:44:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:43,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:43,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:43,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:44:43,517 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:43,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145577, now seen corresponding path program 6 times [2021-06-05 16:44:43,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:43,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334929801] [2021-06-05 16:44:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:43,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:43,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334929801] [2021-06-05 16:44:43,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334929801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:43,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450379589] [2021-06-05 16:44:43,563 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 16:44:43,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:44:43,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:43,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450379589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:43,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:43,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:44:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734185984] [2021-06-05 16:44:43,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:43,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:43,692 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:44,522 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:44:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:44:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:44,528 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:44:44,528 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:44:44,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 483.5ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:44:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:44:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:44:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:44:44,544 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:44:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:44,544 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:44:44,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:44:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:44,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:44,546 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:44,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:44:44,766 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash -705917075, now seen corresponding path program 7 times [2021-06-05 16:44:44,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:44,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278365718] [2021-06-05 16:44:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:44,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:44,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278365718] [2021-06-05 16:44:44,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278365718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:44,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92705194] [2021-06-05 16:44:44,816 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 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 16:44:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92705194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:44,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:44,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:44:44,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034789396] [2021-06-05 16:44:44,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:44,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:44,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:44,967 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:45,644 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:44:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:44:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:45,649 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:44:45,649 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:44:45,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:44:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:44:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:44:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:44:45,661 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:44:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:45,662 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:44:45,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:44:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:45,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:45,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:45,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:45,877 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash -731730967, now seen corresponding path program 1 times [2021-06-05 16:44:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:45,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883488358] [2021-06-05 16:44:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:45,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883488358] [2021-06-05 16:44:45,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883488358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857247682] [2021-06-05 16:44:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:44:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:44:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:46,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857247682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:46,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:46,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:44:46,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785631355] [2021-06-05 16:44:46,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:44:46,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:46,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:44:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:44:46,058 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 16:44:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:46,187 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:44:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:44:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-05 16:44:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:46,191 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:44:46,191 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:44:46,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:44:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:44:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:44:46,205 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:44:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:46,205 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:44:46,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 16:44:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:44:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:46,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:46,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:46,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 16:44:46,417 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1168699675, now seen corresponding path program 8 times [2021-06-05 16:44:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:46,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507470245] [2021-06-05 16:44:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:46,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:46,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507470245] [2021-06-05 16:44:46,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507470245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:46,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979607160] [2021-06-05 16:44:46,461 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 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 16:44:46,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:46,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979607160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:46,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:46,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:44:46,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461281424] [2021-06-05 16:44:46,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:46,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:46,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:46,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:46,583 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:46,765 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:44:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:44:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:46,769 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:44:46,769 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:44:46,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:44:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:44:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:44:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:44:46,784 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:44:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:46,784 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:44:46,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:44:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:46,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:46,796 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:47,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:47,019 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:47,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1874657007, now seen corresponding path program 2 times [2021-06-05 16:44:47,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:47,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705680457] [2021-06-05 16:44:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:47,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:47,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705680457] [2021-06-05 16:44:47,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705680457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:47,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63576031] [2021-06-05 16:44:47,055 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 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 16:44:47,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:44:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63576031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:47,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:47,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:44:47,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774353391] [2021-06-05 16:44:47,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:44:47,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:44:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:44:47,141 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 16:44:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:47,263 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:44:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:44:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-05 16:44:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:47,268 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:44:47,268 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:44:47,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:44:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:44:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:44:47,286 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:44:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:47,286 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:44:47,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 16:44:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:44:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:47,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:47,288 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:47,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:47,501 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1073628723, now seen corresponding path program 9 times [2021-06-05 16:44:47,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:47,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369167084] [2021-06-05 16:44:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:47,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:47,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369167084] [2021-06-05 16:44:47,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369167084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:47,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058557411] [2021-06-05 16:44:47,546 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 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 16:44:47,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:44:47,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:47,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:47,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:47,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058557411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:47,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:47,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:44:47,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020862773] [2021-06-05 16:44:47,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:44:47,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:47,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:44:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:44:47,677 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 16:44:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:48,012 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:44:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:44:48,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-05 16:44:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:48,017 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:44:48,017 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:44:48,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:44:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:44:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:44:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:44:48,037 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:44:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:48,037 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:44:48,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 16:44:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:44:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:48,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:48,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:48,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 16:44:48,262 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:48,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1858542817, now seen corresponding path program 10 times [2021-06-05 16:44:48,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:48,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279333298] [2021-06-05 16:44:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:48,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:48,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279333298] [2021-06-05 16:44:48,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279333298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:48,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029377121] [2021-06-05 16:44:48,302 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 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 16:44:48,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:48,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:48,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:48,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:48,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029377121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:48,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:48,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:44:48,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481916629] [2021-06-05 16:44:48,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:44:48,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:48,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:44:48,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:44:48,424 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 16:44:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:48,910 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:44:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:44:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-05 16:44:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:48,916 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:44:48,916 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:44:48,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:44:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:44:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:44:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:44:48,941 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:44:48,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:48,941 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:44:48,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 16:44:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:44:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:48,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:48,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:49,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:49,167 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash 775520161, now seen corresponding path program 11 times [2021-06-05 16:44:49,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:49,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893774896] [2021-06-05 16:44:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:49,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893774896] [2021-06-05 16:44:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893774896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:49,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183867552] [2021-06-05 16:44:49,223 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 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 16:44:49,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:49,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:49,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183867552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:49,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:49,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:44:49,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53032827] [2021-06-05 16:44:49,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:49,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:49,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:49,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:49,338 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:49,602 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:44:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:44:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:49,608 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:44:49,608 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:44:49,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:44:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:44:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:44:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:44:49,632 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:44:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:49,632 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:44:49,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:44:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:49,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:49,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:49,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:44:49,849 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2048369017, now seen corresponding path program 12 times [2021-06-05 16:44:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:49,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425609621] [2021-06-05 16:44:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:49,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:49,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425609621] [2021-06-05 16:44:49,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425609621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:49,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279310250] [2021-06-05 16:44:49,893 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 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 16:44:49,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:44:49,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:49,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279310250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:49,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:49,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:44:49,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516501291] [2021-06-05 16:44:49,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:49,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:49,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:49,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:49,999 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:50,247 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:44:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:44:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:50,251 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:44:50,251 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:44:50,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:44:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:44:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:44:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:44:50,271 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:44:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:50,271 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:44:50,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:44:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:50,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:50,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:50,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:50,489 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1490304735, now seen corresponding path program 13 times [2021-06-05 16:44:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:50,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458916518] [2021-06-05 16:44:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:50,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:50,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458916518] [2021-06-05 16:44:50,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458916518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:50,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851084888] [2021-06-05 16:44:50,530 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 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 16:44:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:50,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:50,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851084888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:50,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:50,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:44:50,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697277015] [2021-06-05 16:44:50,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:44:50,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:50,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:44:50,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:44:50,617 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 16:44:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:51,007 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:44:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:44:51,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-05 16:44:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:51,014 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:44:51,014 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:44:51,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:44:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:44:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:44:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:44:51,039 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:44:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:51,040 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:44:51,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 16:44:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:44:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:51,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:51,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:51,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:44:51,249 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1541712485, now seen corresponding path program 14 times [2021-06-05 16:44:51,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:51,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881435364] [2021-06-05 16:44:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:51,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:51,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881435364] [2021-06-05 16:44:51,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881435364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:51,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76159287] [2021-06-05 16:44:51,297 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 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 16:44:51,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:51,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:51,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76159287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:51,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:51,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:44:51,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978288224] [2021-06-05 16:44:51,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:51,431 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:52,183 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:44:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:44:52,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:52,195 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:44:52,196 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:44:52,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:44:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:44:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:44:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:44:52,234 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:44:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:52,234 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:44:52,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:44:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:52,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:52,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:52,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 16:44:52,437 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1224350167, now seen corresponding path program 15 times [2021-06-05 16:44:52,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:52,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287536331] [2021-06-05 16:44:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:52,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:52,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287536331] [2021-06-05 16:44:52,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287536331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:52,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159580531] [2021-06-05 16:44:52,476 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 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 16:44:52,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:44:52,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:52,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:52,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159580531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:52,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:52,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:44:52,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111650145] [2021-06-05 16:44:52,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:52,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:52,605 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:53,279 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:44:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:44:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:53,288 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:44:53,288 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:44:53,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:44:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:44:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:44:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:44:53,322 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:44:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:53,322 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:44:53,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:44:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:53,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:53,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:53,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:53,529 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash 936318707, now seen corresponding path program 16 times [2021-06-05 16:44:53,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:53,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062600836] [2021-06-05 16:44:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:53,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:53,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062600836] [2021-06-05 16:44:53,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062600836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:53,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867779800] [2021-06-05 16:44:53,589 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 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 16:44:53,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:53,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:53,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867779800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:53,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:53,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:44:53,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643651329] [2021-06-05 16:44:53,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:44:53,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:44:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:44:53,708 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:44:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:54,384 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:44:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:44:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 16:44:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:54,401 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:44:54,401 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:44:54,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:44:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:44:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:44:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:44:54,433 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:44:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:54,433 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:44:54,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:44:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:44:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:54,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:54,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:54,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 16:44:54,658 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2008635681, now seen corresponding path program 17 times [2021-06-05 16:44:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:54,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530534868] [2021-06-05 16:44:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:54,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:54,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530534868] [2021-06-05 16:44:54,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530534868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:54,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85783839] [2021-06-05 16:44:54,696 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 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 16:44:54,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:44:54,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:54,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:54,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85783839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:54,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:54,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:44:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172217372] [2021-06-05 16:44:54,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:44:54,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:44:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:44:54,796 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:44:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:55,428 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:44:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:44:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 16:44:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:55,434 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:44:55,434 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:44:55,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:44:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:44:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:44:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:44:55,467 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:44:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:55,467 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:44:55,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:44:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:44:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:55,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:55,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:55,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:55,691 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:55,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2817957, now seen corresponding path program 18 times [2021-06-05 16:44:55,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:55,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706546652] [2021-06-05 16:44:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:55,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706546652] [2021-06-05 16:44:55,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706546652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811094928] [2021-06-05 16:44:55,733 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 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 16:44:55,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:44:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:55,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811094928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:55,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:55,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:44:55,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271976488] [2021-06-05 16:44:55,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:55,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:55,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:55,860 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:56,499 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:44:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:44:56,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:56,512 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:44:56,512 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:44:56,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:44:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:44:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:44:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:44:56,544 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:44:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:56,544 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:44:56,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:44:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:56,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:56,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:56,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 16:44:56,761 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:56,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1052559437, now seen corresponding path program 19 times [2021-06-05 16:44:56,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:56,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962534783] [2021-06-05 16:44:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:56,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962534783] [2021-06-05 16:44:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962534783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592649459] [2021-06-05 16:44:56,798 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 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 16:44:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:56,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592649459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:56,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:56,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:44:56,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407511960] [2021-06-05 16:44:56,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:56,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:56,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:56,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:56,904 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:57,502 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:44:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:44:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:44:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:57,508 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:44:57,508 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:44:57,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:44:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:44:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:44:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:44:57,538 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:44:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:57,538 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:44:57,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:44:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:57,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:57,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:57,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 16:44:57,763 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1615861683, now seen corresponding path program 3 times [2021-06-05 16:44:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:57,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209095347] [2021-06-05 16:44:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:57,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:57,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209095347] [2021-06-05 16:44:57,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209095347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:57,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348405146] [2021-06-05 16:44:57,791 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 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 16:44:57,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:44:57,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:44:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:57,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348405146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:57,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:57,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:44:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657330354] [2021-06-05 16:44:57,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:44:57,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:44:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:44:57,881 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 16:44:57,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:57,955 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:44:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:44:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-05 16:44:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:57,957 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:44:57,957 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:44:57,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:44:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:44:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:44:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:44:57,972 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:44:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:57,972 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:44:57,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 16:44:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:44:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:57,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:57,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:58,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:58,197 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash -685661939, now seen corresponding path program 20 times [2021-06-05 16:44:58,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:58,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740319009] [2021-06-05 16:44:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:58,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:58,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740319009] [2021-06-05 16:44:58,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740319009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:58,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822466450] [2021-06-05 16:44:58,231 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 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 16:44:58,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:58,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:58,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822466450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:58,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:58,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:44:58,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718619465] [2021-06-05 16:44:58,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:44:58,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:58,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:44:58,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:44:58,328 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 16:44:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:58,599 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:44:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:44:58,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-06-05 16:44:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:58,603 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:44:58,603 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:44:58,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:44:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:44:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:44:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:44:58,636 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:44:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:58,636 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:44:58,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 16:44:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:44:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:58,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:58,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:58,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:44:58,853 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1217017513, now seen corresponding path program 21 times [2021-06-05 16:44:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:58,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992458916] [2021-06-05 16:44:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:58,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992458916] [2021-06-05 16:44:58,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992458916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881867012] [2021-06-05 16:44:58,882 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 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 16:44:58,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:44:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:58,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881867012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:58,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:58,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:44:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403919583] [2021-06-05 16:44:58,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:44:58,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:44:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:44:58,999 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 16:44:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:59,246 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:44:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:44:59,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-06-05 16:44:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:59,250 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:44:59,250 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:44:59,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:44:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:44:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:44:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:44:59,271 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:44:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:59,271 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:44:59,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 16:44:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:44:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:59,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:59,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:59,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:59,487 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2131830039, now seen corresponding path program 22 times [2021-06-05 16:44:59,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:59,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674303960] [2021-06-05 16:44:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:59,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:59,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674303960] [2021-06-05 16:44:59,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674303960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:59,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534092218] [2021-06-05 16:44:59,518 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 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 16:44:59,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:59,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:44:59,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:59,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534092218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:59,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:59,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:44:59,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355257930] [2021-06-05 16:44:59,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:44:59,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:44:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:44:59,603 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 16:44:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:59,808 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:44:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:44:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-06-05 16:44:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:59,811 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:44:59,811 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:44:59,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:44:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:44:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:44:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:44:59,830 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:44:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:59,830 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:44:59,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 16:44:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:44:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:44:59,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:59,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:00,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:45:00,045 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1241435117, now seen corresponding path program 23 times [2021-06-05 16:45:00,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:00,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690778088] [2021-06-05 16:45:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:00,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:00,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690778088] [2021-06-05 16:45:00,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690778088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:00,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279866301] [2021-06-05 16:45:00,079 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 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 16:45:00,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279866301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:00,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:00,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:45:00,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119964228] [2021-06-05 16:45:00,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:00,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:00,164 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 16:45:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:00,392 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:45:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:00,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-06-05 16:45:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:00,395 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:45:00,395 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:45:00,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:45:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:45:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:45:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:45:00,410 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:45:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:00,410 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:45:00,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 16:45:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:45:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:00,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:00,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:00,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:45:00,629 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1243112745, now seen corresponding path program 24 times [2021-06-05 16:45:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257503048] [2021-06-05 16:45:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:00,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:00,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257503048] [2021-06-05 16:45:00,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257503048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:00,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991865333] [2021-06-05 16:45:00,672 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 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 16:45:00,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:00,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:00,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:00,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991865333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:00,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:00,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:45:00,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648560970] [2021-06-05 16:45:00,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:00,798 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:01,306 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:45:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:45:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:45:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:01,311 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:45:01,311 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:45:01,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:45:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:45:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:45:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:45:01,339 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:45:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:01,340 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:45:01,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:45:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:01,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:01,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:01,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:01,564 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1522949907, now seen corresponding path program 25 times [2021-06-05 16:45:01,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:01,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348173881] [2021-06-05 16:45:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:01,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348173881] [2021-06-05 16:45:01,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348173881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688002807] [2021-06-05 16:45:01,607 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 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 16:45:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:01,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688002807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:01,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:01,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:45:01,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743721141] [2021-06-05 16:45:01,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:01,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:01,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:01,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:01,725 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:02,245 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:45:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:45:02,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:45:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:02,249 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:45:02,249 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:45:02,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:45:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:45:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:45:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:45:02,275 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:45:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:02,275 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:45:02,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:45:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:02,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:02,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:02,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:02,493 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash 637718967, now seen corresponding path program 26 times [2021-06-05 16:45:02,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:02,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120233467] [2021-06-05 16:45:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:02,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:02,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120233467] [2021-06-05 16:45:02,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120233467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:02,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686259624] [2021-06-05 16:45:02,525 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 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 16:45:02,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:02,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:02,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686259624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:02,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:02,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:45:02,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089918724] [2021-06-05 16:45:02,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:45:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:45:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:02,640 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:45:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:03,072 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:45:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:45:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 16:45:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:03,075 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:45:03,075 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:45:03,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:45:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:45:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:45:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:45:03,093 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:45:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:03,093 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:45:03,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:45:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:45:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:03,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:03,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:03,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:03,310 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1710035941, now seen corresponding path program 27 times [2021-06-05 16:45:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:03,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087429893] [2021-06-05 16:45:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:03,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:03,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087429893] [2021-06-05 16:45:03,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087429893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:03,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610902723] [2021-06-05 16:45:03,354 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 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 16:45:03,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:03,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610902723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:03,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:03,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:45:03,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962773344] [2021-06-05 16:45:03,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:45:03,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:03,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:45:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:03,447 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:45:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:03,805 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:45:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:45:03,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-05 16:45:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:03,809 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:45:03,809 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:45:03,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:45:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:45:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:45:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:45:03,826 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:45:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:03,826 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:45:03,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 16:45:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:45:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:03,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:03,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:04,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:04,041 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -295781783, now seen corresponding path program 28 times [2021-06-05 16:45:04,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:04,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886476078] [2021-06-05 16:45:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:04,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886476078] [2021-06-05 16:45:04,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886476078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448075323] [2021-06-05 16:45:04,077 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 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 16:45:04,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:04,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:04,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:04,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448075323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:04,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:04,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:45:04,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157836430] [2021-06-05 16:45:04,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:04,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:04,184 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:04,568 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:45:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:45:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:45:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:04,571 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:45:04,571 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:45:04,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:45:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:45:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:45:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:45:04,589 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:45:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:04,589 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:45:04,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:45:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:04,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:04,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:04,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:04,802 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1351159177, now seen corresponding path program 29 times [2021-06-05 16:45:04,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:04,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813951395] [2021-06-05 16:45:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:04,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:04,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813951395] [2021-06-05 16:45:04,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813951395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:04,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055786894] [2021-06-05 16:45:04,853 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 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 16:45:04,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:04,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:04,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:04,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055786894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:04,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:04,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:45:04,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116872155] [2021-06-05 16:45:04,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:04,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:04,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:04,976 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:05,360 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:45:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:45:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:45:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:05,363 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:45:05,363 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:45:05,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:45:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:45:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:45:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:45:05,387 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:45:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:05,387 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:45:05,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:45:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:05,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:05,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:05,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 16:45:05,605 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:05,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1252113, now seen corresponding path program 30 times [2021-06-05 16:45:05,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:05,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365325819] [2021-06-05 16:45:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:05,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365325819] [2021-06-05 16:45:05,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365325819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:05,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62379494] [2021-06-05 16:45:05,675 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 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 16:45:05,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:05,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:05,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:05,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62379494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:05,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:05,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:45:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274798606] [2021-06-05 16:45:05,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:05,801 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 16:45:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:06,152 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:45:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:45:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-05 16:45:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:06,155 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:45:06,155 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:45:06,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:45:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:45:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:45:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:45:06,174 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:45:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:06,174 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:45:06,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 16:45:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:45:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:06,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:06,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:06,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:06,376 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:06,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1073569087, now seen corresponding path program 31 times [2021-06-05 16:45:06,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:06,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577027345] [2021-06-05 16:45:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:06,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577027345] [2021-06-05 16:45:06,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577027345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824140812] [2021-06-05 16:45:06,428 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 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 16:45:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:06,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:06,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824140812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:06,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:06,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:45:06,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774148792] [2021-06-05 16:45:06,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:06,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:06,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:06,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:06,516 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 16:45:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:06,786 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:45:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:45:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-05 16:45:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:06,789 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:45:06,789 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:45:06,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:45:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:45:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:45:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:45:06,810 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:45:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:06,811 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:45:06,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 16:45:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:45:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:06,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:06,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:07,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 16:45:07,034 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1960561683, now seen corresponding path program 32 times [2021-06-05 16:45:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:07,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487939896] [2021-06-05 16:45:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487939896] [2021-06-05 16:45:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487939896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233284184] [2021-06-05 16:45:07,080 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 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 16:45:07,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:07,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:07,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233284184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:07,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:07,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:45:07,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752903554] [2021-06-05 16:45:07,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:07,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:07,201 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 16:45:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:07,410 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:45:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:07,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-05 16:45:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:07,413 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:45:07,413 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:45:07,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:45:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:45:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:45:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:45:07,428 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:45:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:07,428 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:45:07,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 16:45:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:45:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:07,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:07,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:07,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:07,630 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1288275347, now seen corresponding path program 33 times [2021-06-05 16:45:07,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:07,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671102780] [2021-06-05 16:45:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671102780] [2021-06-05 16:45:07,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671102780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041318857] [2021-06-05 16:45:07,669 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 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 16:45:07,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:07,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041318857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:07,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:07,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:45:07,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821198508] [2021-06-05 16:45:07,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:07,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:07,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:07,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:07,774 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:08,090 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:45:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:45:08,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:45:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:08,093 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:45:08,093 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:45:08,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:45:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:45:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:45:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:45:08,115 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:45:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:08,115 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:45:08,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:45:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:08,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:08,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:08,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:45:08,340 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1951314555, now seen corresponding path program 34 times [2021-06-05 16:45:08,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:08,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998745411] [2021-06-05 16:45:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:08,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998745411] [2021-06-05 16:45:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998745411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130957882] [2021-06-05 16:45:08,380 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 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 16:45:08,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:08,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:08,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:08,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130957882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:08,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:08,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:45:08,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973302145] [2021-06-05 16:45:08,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:08,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:08,480 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:08,764 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:45:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:45:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:45:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:08,767 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:45:08,767 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:45:08,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:45:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:45:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:45:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:45:08,785 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:45:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:08,785 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:45:08,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:45:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:45:08,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:08,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:08,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:08,987 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash -860517803, now seen corresponding path program 35 times [2021-06-05 16:45:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:08,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101810756] [2021-06-05 16:45:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:09,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101810756] [2021-06-05 16:45:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101810756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:09,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003638045] [2021-06-05 16:45:09,023 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 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 16:45:09,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:09,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:45:09,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003638045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:09,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:09,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:45:09,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930899627] [2021-06-05 16:45:09,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:45:09,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:09,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:45:09,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:09,119 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:09,294 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:45:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:45:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:45:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:09,296 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:45:09,297 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:45:09,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:45:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:45:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:45:09,312 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:45:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:09,312 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:45:09,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:45:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:09,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:09,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:09,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:09,529 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1270661831, now seen corresponding path program 4 times [2021-06-05 16:45:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703376504] [2021-06-05 16:45:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:10,052 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 16:45:10,291 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 16:45:10,546 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 16:45:10,756 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:45:10,933 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 16:45:11,003 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 16:45:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703376504] [2021-06-05 16:45:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703376504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400909128] [2021-06-05 16:45:11,003 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 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 16:45:11,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:11,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:11,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:11,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:11,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:45:11,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:45:11,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:45:11,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:45:11,716 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:45:11,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:45:11,747 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:11,755 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:45:11,763 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:45:11,769 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:45:11,777 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:45:11,784 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:45:11,790 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:45:11,798 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,863 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.9 percent of original size [2021-06-05 16:45:11,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:45:11,872 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:50 [2021-06-05 16:45:11,932 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 16:45:11,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400909128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:11,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:11,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265635419] [2021-06-05 16:45:11,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:11,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:11,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:11,934 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:12,348 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 16:45:12,745 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 16:45:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:13,078 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 16:45:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:45:13,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:13,080 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 16:45:13,080 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 16:45:13,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2191.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:45:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 16:45:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 16:45:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:45:13,094 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:45:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:13,095 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:45:13,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:45:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:13,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:13,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:13,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:13,297 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash -757736185, now seen corresponding path program 5 times [2021-06-05 16:45:13,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:13,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365113463] [2021-06-05 16:45:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:13,702 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 16:45:13,828 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:45:14,046 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 16:45:14,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:14,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365113463] [2021-06-05 16:45:14,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365113463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:14,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053524897] [2021-06-05 16:45:14,047 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 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 16:45:14,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:14,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:14,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:45:14,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:14,683 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 16:45:14,743 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_5], 3=[v_prenex_9, v_prenex_7]} [2021-06-05 16:45:14,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:14,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:14,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:45:14,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:14,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:14,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:45:14,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:14,885 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 16:45:14,886 INFO L628 ElimStorePlain]: treesize reduction 73, result has 74.2 percent of original size [2021-06-05 16:45:14,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:14,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:14,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:45:14,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:14,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:14,951 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:45:14,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 54 [2021-06-05 16:45:14,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:14,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:15,004 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:45:15,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 16:45:15,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:15,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:15,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:45:15,046 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:322, output treesize:59 [2021-06-05 16:45:15,128 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 16:45:15,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053524897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:15,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:15,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:45:15,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874434309] [2021-06-05 16:45:15,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:45:15,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:45:15,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:15,129 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:15,575 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2021-06-05 16:45:15,815 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 16:45:16,051 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 16:45:16,220 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 16:45:16,420 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 16:45:16,621 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-06-05 16:45:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:17,166 INFO L93 Difference]: Finished difference Result 1563 states and 5076 transitions. [2021-06-05 16:45:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:17,169 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 16:45:17,169 INFO L226 Difference]: Without dead ends: 1533 [2021-06-05 16:45:17,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2576.9ms TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:45:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-05 16:45:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-06-05 16:45:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 16:45:17,184 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 16:45:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:17,184 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 16:45:17,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 16:45:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:17,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:17,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:17,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:17,387 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 833693123, now seen corresponding path program 36 times [2021-06-05 16:45:17,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:17,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681004746] [2021-06-05 16:45:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:17,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:17,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681004746] [2021-06-05 16:45:17,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681004746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:17,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26569323] [2021-06-05 16:45:17,981 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 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 16:45:18,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:18,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:45:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:45:18,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:45:18,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:45:18,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:45:18,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:45:18,927 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:45:18,937 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:45:18,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:45:18,981 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:45:18,993 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:45:19,002 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:45:19,010 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:45:19,025 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:45:19,034 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:45:19,044 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:45:19,053 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:19,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:19,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:45:19,064 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,087 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 16:45:19,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,088 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 16:45:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:19,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26569323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:19,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:19,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:45:19,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798999146] [2021-06-05 16:45:19,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:19,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:19,124 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:19,607 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-06-05 16:45:19,844 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-05 16:45:19,966 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-06-05 16:45:20,553 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-05 16:45:20,739 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-06-05 16:45:20,904 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-05 16:45:21,231 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 16:45:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:21,311 INFO L93 Difference]: Finished difference Result 1615 states and 5216 transitions. [2021-06-05 16:45:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:45:21,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:21,314 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 16:45:21,314 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 16:45:21,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2405.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:45:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 16:45:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1180. [2021-06-05 16:45:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 16:45:21,329 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 16:45:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:21,329 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 16:45:21,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 16:45:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:21,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:21,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:21,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 16:45:21,532 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:21,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1638740299, now seen corresponding path program 6 times [2021-06-05 16:45:21,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:21,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165217130] [2021-06-05 16:45:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:22,054 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 16:45:22,167 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 16:45:22,324 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 16:45:22,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:22,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165217130] [2021-06-05 16:45:22,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165217130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:22,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849752902] [2021-06-05 16:45:22,325 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 16:45:22,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:22,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:45:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:22,912 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 16:45:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:22,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:22,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:23,152 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:45:23,153 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.6 percent of original size [2021-06-05 16:45:23,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:23,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:23,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:23,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:45:23,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:23,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:45:23,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:23,291 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 16:45:23,292 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.8 percent of original size [2021-06-05 16:45:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:23,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:23,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:45:23,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:23,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:23,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:23,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:23,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:23,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:23,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:45:23,385 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 16:45:23,467 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 16:45:23,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849752902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:23,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:23,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:23,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563623590] [2021-06-05 16:45:23,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:23,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:23,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:23,469 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:23,701 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-06-05 16:45:24,334 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 16:45:24,495 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 16:45:24,817 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 16:45:24,981 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 16:45:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:25,066 INFO L93 Difference]: Finished difference Result 1620 states and 5225 transitions. [2021-06-05 16:45:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:25,068 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 16:45:25,068 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:45:25,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2349.1ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:45:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:45:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1189. [2021-06-05 16:45:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-05 16:45:25,083 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-05 16:45:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:25,083 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-05 16:45:25,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-05 16:45:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:25,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:25,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:25,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:25,289 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1105845433, now seen corresponding path program 37 times [2021-06-05 16:45:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:25,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221688573] [2021-06-05 16:45:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:25,660 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:45:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:25,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:25,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221688573] [2021-06-05 16:45:25,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221688573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:25,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684314632] [2021-06-05 16:45:25,883 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 16:45:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:45:26,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:45:26,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:45:26,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:45:26,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:45:26,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:45:26,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:45:26,746 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:45:26,755 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:45:26,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:45:26,774 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:45:26,783 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:45:26,792 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:45:26,801 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:45:26,809 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:45:26,816 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:45:26,821 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,861 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 16:45:26,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:45:26,863 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 16:45:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:26,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684314632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:26,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:26,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:45:26,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929393580] [2021-06-05 16:45:26,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:26,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:26,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:26,901 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:27,388 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-05 16:45:27,933 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 58 [2021-06-05 16:45:28,235 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-06-05 16:45:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:29,109 INFO L93 Difference]: Finished difference Result 1800 states and 5747 transitions. [2021-06-05 16:45:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:45:29,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:29,112 INFO L225 Difference]: With dead ends: 1800 [2021-06-05 16:45:29,112 INFO L226 Difference]: Without dead ends: 1785 [2021-06-05 16:45:29,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2414.1ms TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:45:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-06-05 16:45:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1201. [2021-06-05 16:45:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-05 16:45:29,127 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-05 16:45:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:29,127 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-05 16:45:29,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-05 16:45:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:29,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:29,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:29,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 16:45:29,330 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2082164277, now seen corresponding path program 38 times [2021-06-05 16:45:29,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:29,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518211565] [2021-06-05 16:45:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:29,745 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 16:45:29,866 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 16:45:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:30,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:30,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518211565] [2021-06-05 16:45:30,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518211565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468295324] [2021-06-05 16:45:30,017 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 16:45:30,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:30,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:30,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:45:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:30,620 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 16:45:30,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 51 [2021-06-05 16:45:30,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:30,672 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-06-05 16:45:30,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 37 [2021-06-05 16:45:30,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:30,755 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 16:45:30,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 59 [2021-06-05 16:45:30,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:30,847 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-05 16:45:30,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 41 [2021-06-05 16:45:30,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 16:45:30,907 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-06-05 16:45:30,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 16:45:30,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:30,932 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:45:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:45:30,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:30,995 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 16:45:30,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 16:45:31,016 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,092 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 16:45:31,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 68 [2021-06-05 16:45:31,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,190 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 16:45:31,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 16:45:31,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,257 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 16:45:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 52 [2021-06-05 16:45:31,261 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,288 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:45:31,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:45:31,293 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,323 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:45:31,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:45:31,324 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,383 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-05 16:45:31,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 46 [2021-06-05 16:45:31,386 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,426 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 16:45:31,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 16:45:31,428 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,450 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:45:31,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:45:31,451 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,506 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 16:45:31,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 16:45:31,521 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:32,296 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 83 [2021-06-05 16:45:32,296 INFO L628 ElimStorePlain]: treesize reduction 402, result has 50.2 percent of original size [2021-06-05 16:45:32,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:45:32,304 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1105, output treesize:406 [2021-06-05 16:45:32,561 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:45:32,770 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 16:45:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:32,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468295324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:32,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:32,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:45:32,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242461971] [2021-06-05 16:45:32,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:45:32,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:32,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:45:32,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:45:32,880 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:33,357 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 16:45:33,960 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 16:45:34,218 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 16:45:34,631 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 16:45:35,432 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 65 [2021-06-05 16:45:35,613 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 16:45:35,896 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-06-05 16:45:36,410 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-05 16:45:36,894 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-06-05 16:45:37,240 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-05 16:45:37,508 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 16:45:38,059 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 114 [2021-06-05 16:45:38,728 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 107 [2021-06-05 16:45:39,217 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2021-06-05 16:45:39,788 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 97 [2021-06-05 16:45:40,457 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 105 [2021-06-05 16:45:40,721 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 16:45:40,934 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:45:41,146 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 16:45:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:41,289 INFO L93 Difference]: Finished difference Result 2410 states and 7510 transitions. [2021-06-05 16:45:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:45:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:41,292 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 16:45:41,292 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 16:45:41,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 8678.1ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:45:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 16:45:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1341. [2021-06-05 16:45:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3007462686567166) internal successors, (4423), 1340 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4423 transitions. [2021-06-05 16:45:41,311 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4423 transitions. Word has length 26 [2021-06-05 16:45:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:41,311 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4423 transitions. [2021-06-05 16:45:41,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4423 transitions. [2021-06-05 16:45:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:41,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:41,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:41,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:41,514 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:41,514 INFO L82 PathProgramCache]: Analyzing trace with hash 127735791, now seen corresponding path program 7 times [2021-06-05 16:45:41,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:41,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029957206] [2021-06-05 16:45:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:41,889 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 16:45:42,085 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 16:45:42,271 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 16:45:42,474 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:45:42,631 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 16:45:42,675 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 16:45:42,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:42,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029957206] [2021-06-05 16:45:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029957206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:42,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052771631] [2021-06-05 16:45:42,676 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 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 16:45:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:43,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:45:43,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:45:43,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:45:43,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:43,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:43,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:45:43,249 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:45:43,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:45:43,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:45:43,273 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:45:43,279 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:45:43,285 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:45:43,293 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:43,299 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:45:43,305 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:43,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:43,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:45:43,317 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,381 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 16:45:43,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:45:43,383 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:45:43,428 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 16:45:43,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052771631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:43,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:43,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:43,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450040358] [2021-06-05 16:45:43,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:43,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:43,429 INFO L87 Difference]: Start difference. First operand 1341 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,192 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 16:45:44,449 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 16:45:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:44,781 INFO L93 Difference]: Finished difference Result 1736 states and 5612 transitions. [2021-06-05 16:45:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:44,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:44,784 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 16:45:44,784 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 16:45:44,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2168.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:45:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 16:45:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1352. [2021-06-05 16:45:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.298297557364915) internal successors, (4456), 1351 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4456 transitions. [2021-06-05 16:45:44,801 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4456 transitions. Word has length 26 [2021-06-05 16:45:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:44,801 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4456 transitions. [2021-06-05 16:45:44,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4456 transitions. [2021-06-05 16:45:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:44,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:44,804 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:45,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 16:45:45,025 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1900662225, now seen corresponding path program 8 times [2021-06-05 16:45:45,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:45,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365884226] [2021-06-05 16:45:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:45,266 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 16:45:45,429 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 16:45:45,590 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 16:45:45,728 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 16:45:45,848 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 16:45:45,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:45,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365884226] [2021-06-05 16:45:45,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365884226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:45,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512314338] [2021-06-05 16:45:45,849 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 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 16:45:45,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:45,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:45,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:45,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:46,249 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 16:45:46,372 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:45:46,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 16:45:46,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:46,546 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-06-05 16:45:46,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:46,572 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:45:46,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 75 [2021-06-05 16:45:46,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:46,753 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 16:45:46,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:46,777 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:45:46,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 16:45:46,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:46,970 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 16:45:46,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:46,991 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:45:46,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 16:45:46,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:47,155 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 16:45:47,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:47,176 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:45:47,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:45:47,178 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:47,335 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 16:45:47,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:47,358 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:45:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 16:45:47,363 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:47,673 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2021-06-05 16:45:47,674 INFO L628 ElimStorePlain]: treesize reduction 16, result has 96.2 percent of original size [2021-06-05 16:45:47,694 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:45:47,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:45:47,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:47,978 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 16:45:47,979 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-05 16:45:47,999 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:45:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 16:45:48,007 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:48,144 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:45:48,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:48,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:45:48,183 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:743, output treesize:480 [2021-06-05 16:45:48,477 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 16:45:48,702 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 16:45:48,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512314338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:48,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:48,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:45:48,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501691585] [2021-06-05 16:45:48,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:45:48,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:45:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:48,703 INFO L87 Difference]: Start difference. First operand 1352 states and 4456 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:49,484 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 16:45:49,955 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 16:45:50,117 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 16:45:50,318 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2021-06-05 16:45:50,675 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-06-05 16:45:50,853 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 16:45:51,058 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-05 16:45:51,210 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 16:45:51,503 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 16:45:51,698 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 16:45:51,998 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 16:45:52,493 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 16:45:52,951 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-06-05 16:45:53,400 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 16:45:53,928 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 16:45:54,216 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 16:45:54,475 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 16:45:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:54,555 INFO L93 Difference]: Finished difference Result 2040 states and 6414 transitions. [2021-06-05 16:45:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:45:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:54,558 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 16:45:54,558 INFO L226 Difference]: Without dead ends: 2025 [2021-06-05 16:45:54,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6505.5ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:45:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-05 16:45:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1363. [2021-06-05 16:45:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.3069016152716593) internal successors, (4504), 1362 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4504 transitions. [2021-06-05 16:45:54,577 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4504 transitions. Word has length 26 [2021-06-05 16:45:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:54,577 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4504 transitions. [2021-06-05 16:45:54,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4504 transitions. [2021-06-05 16:45:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:54,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:54,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:54,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 16:45:54,780 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash 456895363, now seen corresponding path program 9 times [2021-06-05 16:45:54,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:54,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746094067] [2021-06-05 16:45:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:55,047 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 16:45:55,366 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 16:45:55,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:55,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746094067] [2021-06-05 16:45:55,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746094067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:55,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782834953] [2021-06-05 16:45:55,366 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 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 16:45:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:45:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:56,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:56,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:56,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:45:56,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:56,425 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 16:45:56,425 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 16:45:56,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:56,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:45:56,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:56,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:56,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:56,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:56,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:56,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:56,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:56,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:56,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:56,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:45:56,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:56,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:56,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:45:56,658 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 16:45:56,726 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 16:45:56,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782834953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:56,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:56,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:56,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800805858] [2021-06-05 16:45:56,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:56,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:56,727 INFO L87 Difference]: Start difference. First operand 1363 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:56,943 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-05 16:45:57,634 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-05 16:45:57,869 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 16:45:58,165 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-06-05 16:45:58,552 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-05 16:45:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:58,709 INFO L93 Difference]: Finished difference Result 1593 states and 5152 transitions. [2021-06-05 16:45:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:58,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:58,711 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 16:45:58,712 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 16:45:58,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2440.6ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:45:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 16:45:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1372. [2021-06-05 16:45:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 16:45:58,727 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 16:45:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:58,727 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 16:45:58,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 16:45:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:58,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:58,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:58,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:58,930 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:58,930 INFO L82 PathProgramCache]: Analyzing trace with hash 289086271, now seen corresponding path program 10 times [2021-06-05 16:45:58,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:58,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260631305] [2021-06-05 16:45:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:59,333 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-06-05 16:45:59,500 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 16:45:59,653 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 16:45:59,898 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 16:45:59,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:59,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260631305] [2021-06-05 16:45:59,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260631305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:59,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339843163] [2021-06-05 16:45:59,899 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 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 16:45:59,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:45:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:46:00,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:46:00,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:46:00,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:46:00,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:46:00,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:46:00,382 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:46:00,390 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:46:00,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:46:00,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:46:00,413 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:46:00,420 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:46:00,427 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:46:00,433 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:46:00,440 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:46:00,446 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:00,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:00,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:46:00,450 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:00,516 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 16:46:00,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:46:00,517 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:46:00,568 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 16:46:00,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339843163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:00,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:00,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:46:00,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229695477] [2021-06-05 16:46:00,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:46:00,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:46:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:46:00,569 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:00,976 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 16:46:01,244 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 16:46:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:01,498 INFO L93 Difference]: Finished difference Result 1674 states and 5467 transitions. [2021-06-05 16:46:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:46:01,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:01,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:01,501 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 16:46:01,501 INFO L226 Difference]: Without dead ends: 1659 [2021-06-05 16:46:01,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1674.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:46:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-06-05 16:46:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1372. [2021-06-05 16:46:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 16:46:01,516 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 16:46:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:01,516 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 16:46:01,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 16:46:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:01,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:01,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:01,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 16:46:01,718 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1778429757, now seen corresponding path program 11 times [2021-06-05 16:46:01,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:01,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184086005] [2021-06-05 16:46:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:02,211 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 16:46:02,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184086005] [2021-06-05 16:46:02,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184086005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063318227] [2021-06-05 16:46:02,211 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 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 16:46:02,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:46:02,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:02,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:46:02,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:02,933 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:46:02,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2021-06-05 16:46:02,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:02,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:02,960 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:46:02,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:46:02,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:03,166 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:46:03,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:03,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:03,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:03,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 16:46:03,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:03,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:03,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:03,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:46:03,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:03,385 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 16:46:03,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:03,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:03,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 16:46:03,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:03,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:03,431 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:46:03,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:46:03,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:03,602 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:46:03,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:03,623 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:46:03,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:46:03,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:03,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:03,644 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:46:03,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:46:03,646 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:03,804 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:46:03,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:03,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:46:03,836 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:401, output treesize:389 [2021-06-05 16:46:04,032 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 16:46:04,150 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 16:46:04,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063318227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:04,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:04,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:46:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13846206] [2021-06-05 16:46:04,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:46:04,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:46:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:04,151 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:04,607 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-05 16:46:04,770 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2021-06-05 16:46:05,115 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 16:46:05,727 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-05 16:46:06,123 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-06-05 16:46:06,278 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 16:46:06,668 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-06-05 16:46:06,866 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 16:46:07,206 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-06-05 16:46:07,692 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-06-05 16:46:07,988 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-06-05 16:46:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:08,093 INFO L93 Difference]: Finished difference Result 2311 states and 7396 transitions. [2021-06-05 16:46:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:46:08,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:08,097 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 16:46:08,097 INFO L226 Difference]: Without dead ends: 2281 [2021-06-05 16:46:08,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4237.2ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:46:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-05 16:46:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1375. [2021-06-05 16:46:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3151382823871907) internal successors, (4555), 1374 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4555 transitions. [2021-06-05 16:46:08,120 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4555 transitions. Word has length 26 [2021-06-05 16:46:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:08,120 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4555 transitions. [2021-06-05 16:46:08,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4555 transitions. [2021-06-05 16:46:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:08,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:08,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:08,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:08,323 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:08,323 INFO L82 PathProgramCache]: Analyzing trace with hash -746246473, now seen corresponding path program 12 times [2021-06-05 16:46:08,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:08,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060844842] [2021-06-05 16:46:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:08,659 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-06-05 16:46:08,843 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:46:09,010 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 16:46:09,134 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-05 16:46:09,257 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 16:46:09,290 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 16:46:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060844842] [2021-06-05 16:46:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060844842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080288475] [2021-06-05 16:46:09,290 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 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 16:46:09,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:46:09,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:46:09,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:09,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 16:46:09,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:09,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 16:46:09,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,660 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:46:09,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 16:46:09,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,674 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 16:46:09,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:46:09,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,699 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:46:09,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,713 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:46:09,714 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,728 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:46:09,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:46:09,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,743 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:46:09,744 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:46:09,758 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,769 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 16:46:09,770 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,782 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:46:09,783 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:09,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 16:46:09,799 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,813 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:46:09,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 16:46:09,814 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:46:09,825 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:09,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:09,833 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:46:09,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:46:09,834 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:09,910 INFO L628 ElimStorePlain]: treesize reduction 49, result has 63.7 percent of original size [2021-06-05 16:46:09,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:46:09,911 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 16:46:10,071 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 16:46:10,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080288475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:10,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:10,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:46:10,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365887366] [2021-06-05 16:46:10,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:46:10,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:46:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:46:10,072 INFO L87 Difference]: Start difference. First operand 1375 states and 4555 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:10,776 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-05 16:46:11,007 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-06-05 16:46:11,220 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 16:46:11,349 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 16:46:11,535 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-06-05 16:46:11,789 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 16:46:11,973 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 16:46:12,168 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-05 16:46:12,310 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 16:46:12,557 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-06-05 16:46:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:12,670 INFO L93 Difference]: Finished difference Result 1790 states and 5831 transitions. [2021-06-05 16:46:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:46:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:12,672 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:46:12,672 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 16:46:12,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3116.7ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:46:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 16:46:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1378. [2021-06-05 16:46:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.316630355846042) internal successors, (4567), 1377 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4567 transitions. [2021-06-05 16:46:12,690 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4567 transitions. Word has length 26 [2021-06-05 16:46:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:12,690 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4567 transitions. [2021-06-05 16:46:12,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4567 transitions. [2021-06-05 16:46:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:12,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:12,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:12,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 16:46:12,909 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash 148423883, now seen corresponding path program 13 times [2021-06-05 16:46:12,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:12,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675016460] [2021-06-05 16:46:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:13,163 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-06-05 16:46:13,490 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 16:46:13,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:13,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675016460] [2021-06-05 16:46:13,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675016460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:13,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231219690] [2021-06-05 16:46:13,490 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 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 16:46:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:14,025 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 16:46:14,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:14,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:14,119 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:46:14,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 16:46:14,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:14,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:14,142 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:46:14,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 57 [2021-06-05 16:46:14,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:14,320 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-05 16:46:14,321 INFO L628 ElimStorePlain]: treesize reduction 211, result has 55.7 percent of original size [2021-06-05 16:46:14,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:46:14,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:14,345 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:46:14,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-06-05 16:46:14,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:14,445 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.4 percent of original size [2021-06-05 16:46:14,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:14,455 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:46:14,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-06-05 16:46:14,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:14,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:14,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:14,515 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:46:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 53 [2021-06-05 16:46:14,516 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:14,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:14,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:46:14,554 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:619, output treesize:64 [2021-06-05 16:46:14,624 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 16:46:14,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231219690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:14,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:14,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:46:14,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34802261] [2021-06-05 16:46:14,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:46:14,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:14,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:46:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:46:14,626 INFO L87 Difference]: Start difference. First operand 1378 states and 4567 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:14,969 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 16:46:15,447 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-05 16:46:15,935 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-06-05 16:46:16,163 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 16:46:16,461 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:46:16,676 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 16:46:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:16,842 INFO L93 Difference]: Finished difference Result 2164 states and 6833 transitions. [2021-06-05 16:46:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:46:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:16,846 INFO L225 Difference]: With dead ends: 2164 [2021-06-05 16:46:16,846 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 16:46:16,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2558.2ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:46:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 16:46:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2021-06-05 16:46:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-05 16:46:16,864 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-05 16:46:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:16,864 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-05 16:46:16,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-05 16:46:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:16,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:16,866 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:17,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 16:46:17,067 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -806418041, now seen corresponding path program 39 times [2021-06-05 16:46:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706657916] [2021-06-05 16:46:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:17,509 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 16:46:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:17,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706657916] [2021-06-05 16:46:17,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706657916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113867445] [2021-06-05 16:46:17,827 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 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 16:46:17,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:46:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:46:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:18,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2021-06-05 16:46:18,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 16:46:18,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-06-05 16:46:18,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-06-05 16:46:18,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-06-05 16:46:18,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 18 [2021-06-05 16:46:18,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:46:18,338 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 12 [2021-06-05 16:46:18,349 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-06-05 16:46:18,362 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 16:46:18,372 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 28 [2021-06-05 16:46:18,381 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 14 [2021-06-05 16:46:18,390 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 24 [2021-06-05 16:46:18,399 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 16:46:18,407 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 24 [2021-06-05 16:46:18,417 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:18,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2021-06-05 16:46:18,422 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:18,470 INFO L628 ElimStorePlain]: treesize reduction 50, result has 49.5 percent of original size [2021-06-05 16:46:18,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:46:18,471 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:49 [2021-06-05 16:46:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:18,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113867445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:18,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:18,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:46:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818127745] [2021-06-05 16:46:18,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:46:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:46:18,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:46:18,558 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:19,030 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 16:46:19,447 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-06-05 16:46:19,939 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-05 16:46:20,642 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-05 16:46:21,774 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 16:46:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:22,208 INFO L93 Difference]: Finished difference Result 3078 states and 9474 transitions. [2021-06-05 16:46:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:46:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:22,212 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 16:46:22,212 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 16:46:22,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3797.6ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:46:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 16:46:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1413. [2021-06-05 16:46:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3208215297450425) internal successors, (4689), 1412 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4689 transitions. [2021-06-05 16:46:22,234 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4689 transitions. Word has length 26 [2021-06-05 16:46:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:22,235 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4689 transitions. [2021-06-05 16:46:22,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4689 transitions. [2021-06-05 16:46:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:22,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:22,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:22,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:22,437 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1738294259, now seen corresponding path program 14 times [2021-06-05 16:46:22,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:22,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798643583] [2021-06-05 16:46:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:22,808 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 16:46:23,000 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 16:46:23,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:23,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798643583] [2021-06-05 16:46:23,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798643583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:23,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204211435] [2021-06-05 16:46:23,000 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 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 16:46:23,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:23,464 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:46:23,855 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2021-06-05 16:46:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:24,123 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 16:46:24,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 89 [2021-06-05 16:46:24,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:24,144 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-06-05 16:46:24,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 1 [2021-06-05 16:46:24,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:24,707 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2021-06-05 16:46:24,708 INFO L628 ElimStorePlain]: treesize reduction 788, result has 46.3 percent of original size [2021-06-05 16:46:24,736 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:46:24,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 52 [2021-06-05 16:46:24,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:24,918 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-06-05 16:46:24,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:24,951 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:46:24,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 69 [2021-06-05 16:46:24,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:25,124 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 16:46:25,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:25,149 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:46:25,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 62 [2021-06-05 16:46:25,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:25,327 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:46:25,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:25,348 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:46:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 55 [2021-06-05 16:46:25,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:25,518 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 16:46:25,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:25,552 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:46:25,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-06-05 16:46:25,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:25,723 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:46:25,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:25,753 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:46:25,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 72 [2021-06-05 16:46:25,755 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:25,911 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:46:25,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:25,940 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:46:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-06-05 16:46:25,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:26,092 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:46:26,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:26,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:46:26,125 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1661, output treesize:498 [2021-06-05 16:46:26,372 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 16:46:26,467 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 16:46:26,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204211435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:26,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:26,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:46:26,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809958605] [2021-06-05 16:46:26,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:46:26,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:46:26,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:46:26,468 INFO L87 Difference]: Start difference. First operand 1413 states and 4689 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:27,101 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:46:27,293 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 16:46:27,460 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 16:46:27,764 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 16:46:28,021 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 16:46:28,197 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-06-05 16:46:28,431 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 16:46:28,810 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-06-05 16:46:29,446 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 16:46:31,229 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 277 DAG size of output: 259 [2021-06-05 16:46:31,951 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2021-06-05 16:46:32,533 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 16:46:33,288 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2021-06-05 16:46:35,294 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 274 DAG size of output: 258 [2021-06-05 16:46:37,429 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 303 DAG size of output: 279 [2021-06-05 16:46:38,080 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-05 16:46:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:38,675 INFO L93 Difference]: Finished difference Result 2106 states and 6748 transitions. [2021-06-05 16:46:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:46:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:38,679 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 16:46:38,679 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 16:46:38,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 11718.4ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:46:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 16:46:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1409. [2021-06-05 16:46:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 16:46:38,698 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 16:46:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:38,698 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 16:46:38,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 16:46:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:38,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:38,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:38,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable609 [2021-06-05 16:46:38,901 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:38,902 INFO L82 PathProgramCache]: Analyzing trace with hash 120761479, now seen corresponding path program 15 times [2021-06-05 16:46:38,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:38,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286337740] [2021-06-05 16:46:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:39,363 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 16:46:39,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286337740] [2021-06-05 16:46:39,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286337740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84808570] [2021-06-05 16:46:39,363 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 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 16:46:39,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:46:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:39,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:39,797 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 16:46:39,910 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_80, v_prenex_87, v_prenex_85, v_prenex_78], 6=[v_prenex_83, A, v_prenex_76, v_prenex_89]} [2021-06-05 16:46:39,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:39,933 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:46:39,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:46:39,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:40,392 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 153 [2021-06-05 16:46:40,397 INFO L628 ElimStorePlain]: treesize reduction 413, result has 53.5 percent of original size [2021-06-05 16:46:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:40,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:40,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:46:40,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:40,561 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 16:46:40,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:40,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:40,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:46:40,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:40,715 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 16:46:40,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:40,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:40,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:46:40,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:40,866 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:46:40,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:40,884 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:46:40,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 16:46:40,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:41,015 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:46:41,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:41,037 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 16:46:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 16:46:41,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:41,163 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:46:41,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:41,184 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:46:41,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 16:46:41,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:41,304 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:46:41,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:41,318 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:46:41,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2021-06-05 16:46:41,319 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:41,431 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:46:41,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:41,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:46:41,439 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:903, output treesize:216 [2021-06-05 16:46:41,591 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 16:46:41,694 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 16:46:41,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84808570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:41,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:41,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:46:41,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137687368] [2021-06-05 16:46:41,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:46:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:46:41,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:46:41,695 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:42,104 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 16:46:42,381 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 16:46:42,540 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 16:46:42,676 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 16:46:43,428 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-06-05 16:46:43,773 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 16:46:43,966 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 16:46:44,720 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2021-06-05 16:46:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:45,161 INFO L93 Difference]: Finished difference Result 2320 states and 7312 transitions. [2021-06-05 16:46:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:46:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:45,165 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 16:46:45,165 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 16:46:45,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3629.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:46:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 16:46:45,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1409. [2021-06-05 16:46:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 16:46:45,187 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 16:46:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:45,188 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 16:46:45,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 16:46:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:45,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:45,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:45,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 16:46:45,390 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 395894327, now seen corresponding path program 40 times [2021-06-05 16:46:45,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:45,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891725009] [2021-06-05 16:46:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:46,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:46,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891725009] [2021-06-05 16:46:46,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891725009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249970885] [2021-06-05 16:46:46,127 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 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 16:46:46,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:46,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:46,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:46,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 16:46:46,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 16:46:46,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:46:46,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 16:46:46,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 16:46:46,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:46:46,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 16:46:46,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 16:46:46,942 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 16:46:46,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 16:46:46,970 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 16:46:46,979 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:46:46,990 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:46,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 16:46:47,000 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:47,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:47,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:47,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:46:47,009 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:47,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:47,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:46:47,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:47,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 16:46:47,024 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:47,109 INFO L628 ElimStorePlain]: treesize reduction 348, result has 12.3 percent of original size [2021-06-05 16:46:47,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:46:47,110 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:43 [2021-06-05 16:46:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:47,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249970885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:47,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:47,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 16:46:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942524383] [2021-06-05 16:46:47,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:46:47,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:47,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:46:47,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:46:47,156 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:47,580 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 16:46:47,802 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 16:46:48,222 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-05 16:46:48,415 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-05 16:46:48,992 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 16:46:49,173 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 16:46:49,587 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-05 16:46:49,949 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 16:46:50,452 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-06-05 16:46:50,629 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 16:46:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:51,005 INFO L93 Difference]: Finished difference Result 2743 states and 8648 transitions. [2021-06-05 16:46:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:46:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:51,010 INFO L225 Difference]: With dead ends: 2743 [2021-06-05 16:46:51,010 INFO L226 Difference]: Without dead ends: 2698 [2021-06-05 16:46:51,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3962.6ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:46:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-05 16:46:51,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1412. [2021-06-05 16:46:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.3217576187101345) internal successors, (4687), 1411 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4687 transitions. [2021-06-05 16:46:51,031 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4687 transitions. Word has length 26 [2021-06-05 16:46:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:51,031 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4687 transitions. [2021-06-05 16:46:51,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4687 transitions. [2021-06-05 16:46:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:51,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:51,033 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:51,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 16:46:51,234 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2065424317, now seen corresponding path program 41 times [2021-06-05 16:46:51,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:51,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081546931] [2021-06-05 16:46:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:51,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:51,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081546931] [2021-06-05 16:46:51,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081546931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:51,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6114625] [2021-06-05 16:46:51,778 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 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 16:46:51,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:46:51,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:51,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:46:51,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,442 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:46:52,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 16:46:52,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,476 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:46:52,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 16:46:52,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,514 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:46:52,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 16:46:52,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,549 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:46:52,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-06-05 16:46:52,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,598 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:46:52,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 16:46:52,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,640 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:46:52,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 38 [2021-06-05 16:46:52,643 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,660 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:46:52,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,677 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:46:52,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,695 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:46:52,696 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,735 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:46:52,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 16:46:52,737 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,754 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:46:52,755 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,770 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:46:52,772 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,798 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:46:52,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-06-05 16:46:52,799 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,815 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:46:52,816 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,833 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 16:46:52,834 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:52,844 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:46:52,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:46:52,844 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:52,978 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-06-05 16:46:52,978 INFO L628 ElimStorePlain]: treesize reduction 202, result has 36.7 percent of original size [2021-06-05 16:46:52,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:46:52,991 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:103 [2021-06-05 16:46:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:53,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6114625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:53,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:53,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 16:46:53,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452662771] [2021-06-05 16:46:53,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:46:53,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:46:53,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:46:53,146 INFO L87 Difference]: Start difference. First operand 1412 states and 4687 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:53,562 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:46:53,857 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:46:54,091 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 16:46:54,399 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:46:54,785 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-06-05 16:46:55,226 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 16:46:55,481 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:46:55,755 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 16:46:56,012 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-05 16:46:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:56,285 INFO L93 Difference]: Finished difference Result 2483 states and 7959 transitions. [2021-06-05 16:46:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:46:56,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:56,288 INFO L225 Difference]: With dead ends: 2483 [2021-06-05 16:46:56,288 INFO L226 Difference]: Without dead ends: 2453 [2021-06-05 16:46:56,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 3239.1ms TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:46:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-05 16:46:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1413. [2021-06-05 16:46:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3236543909348444) internal successors, (4693), 1412 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4693 transitions. [2021-06-05 16:46:56,318 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4693 transitions. Word has length 26 [2021-06-05 16:46:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:56,319 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4693 transitions. [2021-06-05 16:46:56,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4693 transitions. [2021-06-05 16:46:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:56,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:56,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:56,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-05 16:46:56,535 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash 386531115, now seen corresponding path program 16 times [2021-06-05 16:46:56,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:56,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939291873] [2021-06-05 16:46:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:56,766 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 16:46:56,907 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 16:46:57,185 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 16:46:57,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:57,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939291873] [2021-06-05 16:46:57,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939291873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:57,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573560042] [2021-06-05 16:46:57,186 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 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 16:46:57,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:46:57,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:46:57,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:46:57,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:46:57,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:46:57,699 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:46:57,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:46:57,719 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:46:57,728 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:46:57,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:46:57,747 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:46:57,756 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:46:57,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:46:57,773 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:46:57,782 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:46:57,790 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:57,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:46:57,796 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:57,874 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 16:46:57,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:46:57,876 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:46:57,934 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 16:46:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573560042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:57,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:57,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:46:57,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738478754] [2021-06-05 16:46:57,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:46:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:46:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:46:57,935 INFO L87 Difference]: Start difference. First operand 1413 states and 4693 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:58,577 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 16:46:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:58,947 INFO L93 Difference]: Finished difference Result 1799 states and 5861 transitions. [2021-06-05 16:46:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:46:58,947 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:58,950 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 16:46:58,950 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 16:46:58,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1507.9ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:46:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 16:46:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1422. [2021-06-05 16:46:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 16:46:58,970 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 16:46:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:58,970 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 16:46:58,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 16:46:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:58,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:58,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:59,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:59,185 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash 715690687, now seen corresponding path program 17 times [2021-06-05 16:46:59,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:59,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799292219] [2021-06-05 16:46:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:59,609 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 16:46:59,807 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 16:46:59,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799292219] [2021-06-05 16:46:59,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799292219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:59,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009880804] [2021-06-05 16:46:59,808 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 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 16:46:59,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:46:59,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:46:59,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:00,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:00,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:00,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:47:00,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:00,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:47:00,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:00,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:00,324 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:00,330 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:00,339 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:00,347 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:00,353 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:47:00,359 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:00,365 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:47:00,370 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:00,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:00,445 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-05 16:47:00,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:47:00,447 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:47:00,497 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 16:47:00,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009880804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:00,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:00,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:47:00,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5003084] [2021-06-05 16:47:00,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:00,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:00,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:00,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:00,498 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:00,944 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-06-05 16:47:01,105 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-06-05 16:47:01,406 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 16:47:01,577 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 16:47:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:02,078 INFO L93 Difference]: Finished difference Result 1615 states and 5256 transitions. [2021-06-05 16:47:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:47:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:02,080 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 16:47:02,080 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 16:47:02,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2030.9ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:47:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 16:47:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1431. [2021-06-05 16:47:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 3.327972027972028) internal successors, (4759), 1430 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4759 transitions. [2021-06-05 16:47:02,098 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4759 transitions. Word has length 26 [2021-06-05 16:47:02,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:02,099 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4759 transitions. [2021-06-05 16:47:02,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4759 transitions. [2021-06-05 16:47:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:02,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:02,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:02,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-05 16:47:02,301 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:02,302 INFO L82 PathProgramCache]: Analyzing trace with hash 547881595, now seen corresponding path program 18 times [2021-06-05 16:47:02,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:02,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000273470] [2021-06-05 16:47:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:02,678 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-06-05 16:47:02,963 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2021-06-05 16:47:03,198 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-06-05 16:47:03,406 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 16:47:03,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:03,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000273470] [2021-06-05 16:47:03,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000273470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:03,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965644879] [2021-06-05 16:47:03,406 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 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 16:47:03,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:47:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:47:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:03,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:47:03,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,822 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:03,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:03,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:47:03,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,848 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:03,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:03,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:03,870 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,880 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:03,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:03,891 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,903 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:47:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:47:03,905 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,915 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:03,916 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,926 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:03,926 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:47:03,937 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:47:03,948 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,958 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:47:03,959 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:03,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:47:03,972 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:03,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:03,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:03,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:47:03,980 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:04,072 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.8 percent of original size [2021-06-05 16:47:04,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:47:04,076 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-06-05 16:47:04,229 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 16:47:04,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965644879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:04,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:04,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:47:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547991715] [2021-06-05 16:47:04,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:04,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:04,230 INFO L87 Difference]: Start difference. First operand 1431 states and 4759 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:04,929 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-06-05 16:47:05,067 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 16:47:05,408 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 16:47:05,642 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 16:47:05,994 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:47:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:06,061 INFO L93 Difference]: Finished difference Result 1909 states and 6216 transitions. [2021-06-05 16:47:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:47:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:06,064 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 16:47:06,064 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 16:47:06,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2555.4ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:47:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 16:47:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1422. [2021-06-05 16:47:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 16:47:06,082 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 16:47:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:06,082 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 16:47:06,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 16:47:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:06,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:06,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:06,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:06,284 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2104983929, now seen corresponding path program 19 times [2021-06-05 16:47:06,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:06,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69510826] [2021-06-05 16:47:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:06,554 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-05 16:47:06,680 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-05 16:47:06,807 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 16:47:07,068 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 16:47:07,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:07,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69510826] [2021-06-05 16:47:07,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69510826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:07,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634645670] [2021-06-05 16:47:07,068 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 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 16:47:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:07,470 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:47:07,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:07,535 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:47:07,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:47:07,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:07,672 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:47:07,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:07,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:07,686 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:47:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:47:07,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:07,824 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:47:07,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:07,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:47:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:47:07,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:07,972 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 16:47:07,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:07,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:07,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:47:07,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:08,135 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:47:08,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:08,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:47:08,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:08,272 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:47:08,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:08,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:47:08,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:08,406 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:47:08,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:08,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:47:08,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:08,534 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:47:08,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:08,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:47:08,547 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:08,657 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:47:08,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:47:08,666 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 16:47:08,818 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 16:47:08,906 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 16:47:08,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634645670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:08,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:08,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:47:08,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128488241] [2021-06-05 16:47:08,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:47:08,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:08,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:47:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:08,907 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:09,698 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 16:47:09,983 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-06-05 16:47:10,252 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 16:47:10,748 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 16:47:11,183 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 16:47:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:11,424 INFO L93 Difference]: Finished difference Result 2073 states and 6674 transitions. [2021-06-05 16:47:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:47:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:11,427 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 16:47:11,427 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 16:47:11,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3199.7ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:47:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 16:47:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1419. [2021-06-05 16:47:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3222849083215795) internal successors, (4711), 1418 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4711 transitions. [2021-06-05 16:47:11,454 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4711 transitions. Word has length 26 [2021-06-05 16:47:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:11,454 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4711 transitions. [2021-06-05 16:47:11,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4711 transitions. [2021-06-05 16:47:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:11,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:11,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:11,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-05 16:47:11,673 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash 178197831, now seen corresponding path program 20 times [2021-06-05 16:47:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:11,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669791403] [2021-06-05 16:47:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:12,100 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 16:47:12,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:12,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669791403] [2021-06-05 16:47:12,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669791403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:12,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726941507] [2021-06-05 16:47:12,101 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 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 16:47:12,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:12,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:12,529 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:12,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,550 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:12,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:47:12,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,569 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:47:12,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 23 [2021-06-05 16:47:12,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,579 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:12,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,600 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:12,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:47:12,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,611 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:12,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,621 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:12,622 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,636 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:47:12,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 16 [2021-06-05 16:47:12,637 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:12,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:47:12,655 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,665 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:47:12,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,676 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:47:12,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,686 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:12,687 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,705 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:47:12,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:47:12,706 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,717 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:12,718 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,729 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:12,731 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,739 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:12,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:47:12,739 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,863 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 16:47:12,863 INFO L628 ElimStorePlain]: treesize reduction 63, result has 68.8 percent of original size [2021-06-05 16:47:12,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:47:12,870 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-06-05 16:47:13,012 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 16:47:13,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726941507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:13,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:13,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:47:13,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053605455] [2021-06-05 16:47:13,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:13,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:13,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:13,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:13,013 INFO L87 Difference]: Start difference. First operand 1419 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:14,327 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 16:47:14,745 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:47:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:15,335 INFO L93 Difference]: Finished difference Result 1996 states and 6371 transitions. [2021-06-05 16:47:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:47:15,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:15,339 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 16:47:15,339 INFO L226 Difference]: Without dead ends: 1956 [2021-06-05 16:47:15,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2465.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:47:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-05 16:47:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1468. [2021-06-05 16:47:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.319700068166326) internal successors, (4870), 1467 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4870 transitions. [2021-06-05 16:47:15,357 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4870 transitions. Word has length 26 [2021-06-05 16:47:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:15,357 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4870 transitions. [2021-06-05 16:47:15,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4870 transitions. [2021-06-05 16:47:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:15,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:15,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:15,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-05 16:47:15,560 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2057127289, now seen corresponding path program 21 times [2021-06-05 16:47:15,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:15,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124854108] [2021-06-05 16:47:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:15,990 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 16:47:15,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:15,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124854108] [2021-06-05 16:47:15,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124854108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:15,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005351964] [2021-06-05 16:47:15,990 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 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 16:47:16,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:47:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:47:16,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:16,369 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:16,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:47:16,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,381 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:47:16,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,401 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:47:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:47:16,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,425 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:16,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:47:16,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,439 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:16,440 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,450 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:47:16,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,473 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:47:16,474 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,485 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:16,485 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,506 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:16,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 16:47:16,508 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,519 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:16,520 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,532 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:16,533 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,556 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:16,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:47:16,557 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,569 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:16,572 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:16,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:47:16,590 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,600 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:47:16,600 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,607 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:16,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:16,608 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:16,830 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 16:47:16,830 INFO L628 ElimStorePlain]: treesize reduction 156, result has 50.5 percent of original size [2021-06-05 16:47:16,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:47:16,838 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:221 [2021-06-05 16:47:16,990 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 16:47:17,184 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 16:47:17,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005351964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:17,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:17,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:47:17,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233471377] [2021-06-05 16:47:17,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:17,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:17,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:17,185 INFO L87 Difference]: Start difference. First operand 1468 states and 4870 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:17,381 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 33 [2021-06-05 16:47:17,891 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 16:47:18,282 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 16:47:18,504 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 16:47:18,852 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 16:47:19,085 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-05 16:47:19,385 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 16:47:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:19,459 INFO L93 Difference]: Finished difference Result 2188 states and 6976 transitions. [2021-06-05 16:47:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:47:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:19,462 INFO L225 Difference]: With dead ends: 2188 [2021-06-05 16:47:19,462 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 16:47:19,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2516.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:47:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 16:47:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1486. [2021-06-05 16:47:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3252525252525253) internal successors, (4938), 1485 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4938 transitions. [2021-06-05 16:47:19,484 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4938 transitions. Word has length 26 [2021-06-05 16:47:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:19,484 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4938 transitions. [2021-06-05 16:47:19,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4938 transitions. [2021-06-05 16:47:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:19,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:19,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:19,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:19,710 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash 309162187, now seen corresponding path program 22 times [2021-06-05 16:47:19,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:19,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236680944] [2021-06-05 16:47:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:19,959 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 16:47:20,125 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-05 16:47:20,414 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 16:47:20,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:20,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236680944] [2021-06-05 16:47:20,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236680944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:20,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943849189] [2021-06-05 16:47:20,414 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 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 16:47:20,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:47:20,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:47:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:20,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:20,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:20,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:20,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:47:20,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:20,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:20,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:20,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:20,907 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:47:20,908 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.4 percent of original size [2021-06-05 16:47:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:20,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:20,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:20,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:20,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:20,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:20,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:21,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:21,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:47:21,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:21,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:47:21,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:21,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:21,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:47:21,098 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:72 [2021-06-05 16:47:21,171 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 16:47:21,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943849189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:21,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:21,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:47:21,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527312066] [2021-06-05 16:47:21,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:47:21,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:21,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:47:21,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:47:21,172 INFO L87 Difference]: Start difference. First operand 1486 states and 4938 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:21,523 INFO L93 Difference]: Finished difference Result 1609 states and 5273 transitions. [2021-06-05 16:47:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:47:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:21,526 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 16:47:21,526 INFO L226 Difference]: Without dead ends: 1594 [2021-06-05 16:47:21,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 921.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-05 16:47:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1492. [2021-06-05 16:47:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3272971160295106) internal successors, (4961), 1491 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4961 transitions. [2021-06-05 16:47:21,543 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4961 transitions. Word has length 26 [2021-06-05 16:47:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:21,543 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 4961 transitions. [2021-06-05 16:47:21,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4961 transitions. [2021-06-05 16:47:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:21,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:21,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:21,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:21,746 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:21,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1879987787, now seen corresponding path program 23 times [2021-06-05 16:47:21,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:21,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220199586] [2021-06-05 16:47:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:22,180 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-06-05 16:47:22,233 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 16:47:22,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220199586] [2021-06-05 16:47:22,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220199586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61453291] [2021-06-05 16:47:22,233 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 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 16:47:22,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:47:22,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:47:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:22,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:22,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:47:22,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:22,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:22,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:47:22,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:22,752 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:47:22,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:22,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:22,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:22,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:47:22,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:22,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:22,777 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:22,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:22,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:22,886 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:47:22,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:22,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:22,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:47:22,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:22,920 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:47:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:47:22,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,030 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:47:23,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:23,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:23,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:47:23,044 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,055 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:47:23,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:47:23,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,218 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 16:47:23,218 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-06-05 16:47:23,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:47:23,234 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-06-05 16:47:23,418 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 16:47:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61453291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:23,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:23,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:47:23,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762573819] [2021-06-05 16:47:23,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:47:23,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:47:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:23,419 INFO L87 Difference]: Start difference. First operand 1492 states and 4961 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:24,403 INFO L93 Difference]: Finished difference Result 1996 states and 6490 transitions. [2021-06-05 16:47:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:47:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:24,406 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 16:47:24,406 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 16:47:24,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1356.3ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:47:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 16:47:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1499. [2021-06-05 16:47:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.3317757009345796) internal successors, (4991), 1498 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4991 transitions. [2021-06-05 16:47:24,424 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4991 transitions. Word has length 26 [2021-06-05 16:47:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:24,424 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 4991 transitions. [2021-06-05 16:47:24,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4991 transitions. [2021-06-05 16:47:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:24,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:24,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:24,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:24,627 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash -224872725, now seen corresponding path program 24 times [2021-06-05 16:47:24,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:24,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862222232] [2021-06-05 16:47:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:25,103 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-06-05 16:47:25,437 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-06-05 16:47:25,703 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-05 16:47:25,951 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 16:47:25,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862222232] [2021-06-05 16:47:25,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862222232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445421865] [2021-06-05 16:47:25,952 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 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 16:47:25,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:47:25,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:47:25,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:26,452 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:47:26,765 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2021-06-05 16:47:26,868 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_125], 6=[v_prenex_123, v_prenex_124, v_prenex_126]} [2021-06-05 16:47:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:26,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:26,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:26,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:27,072 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 16:47:27,072 INFO L628 ElimStorePlain]: treesize reduction 263, result has 47.9 percent of original size [2021-06-05 16:47:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:27,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:27,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:27,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:27,154 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:47:27,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 35 [2021-06-05 16:47:27,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:27,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:27,232 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:47:27,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:47:27,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:27,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:27,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:27,303 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:47:27,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 48 [2021-06-05 16:47:27,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:27,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:27,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:47:27,353 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:521, output treesize:74 [2021-06-05 16:47:27,433 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 16:47:27,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445421865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:27,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:27,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:47:27,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517721314] [2021-06-05 16:47:27,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:47:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:47:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:27,435 INFO L87 Difference]: Start difference. First operand 1499 states and 4991 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:27,641 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 32 [2021-06-05 16:47:28,311 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 16:47:28,731 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 16:47:29,154 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 123 [2021-06-05 16:47:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:29,284 INFO L93 Difference]: Finished difference Result 1881 states and 6161 transitions. [2021-06-05 16:47:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:47:29,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:29,287 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 16:47:29,287 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 16:47:29,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3176.6ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:47:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 16:47:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1508. [2021-06-05 16:47:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.33178500331785) internal successors, (5021), 1507 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5021 transitions. [2021-06-05 16:47:29,306 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5021 transitions. Word has length 26 [2021-06-05 16:47:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:29,306 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 5021 transitions. [2021-06-05 16:47:29,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5021 transitions. [2021-06-05 16:47:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:29,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:29,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:29,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 16:47:29,508 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1842405505, now seen corresponding path program 25 times [2021-06-05 16:47:29,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:29,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195733236] [2021-06-05 16:47:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:30,126 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 16:47:30,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:30,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195733236] [2021-06-05 16:47:30,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195733236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:30,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313796264] [2021-06-05 16:47:30,126 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 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 16:47:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:30,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:30,589 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:47:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:30,729 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 16:47:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 68 [2021-06-05 16:47:30,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:30,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:30,746 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:47:30,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-06-05 16:47:30,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:31,181 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 173 [2021-06-05 16:47:31,182 INFO L628 ElimStorePlain]: treesize reduction 703, result has 43.6 percent of original size [2021-06-05 16:47:31,196 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:31,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 16:47:31,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:31,342 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 16:47:31,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:31,361 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:47:31,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 35 [2021-06-05 16:47:31,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:31,641 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-06-05 16:47:31,642 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.4 percent of original size [2021-06-05 16:47:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:31,658 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:47:31,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 16:47:31,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:31,797 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 16:47:31,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:31,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:31,821 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:47:31,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 16:47:31,823 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:31,956 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 16:47:31,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:31,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:31,976 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 16:47:31,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 16:47:31,978 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,101 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:47:32,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:32,115 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:32,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 16:47:32,116 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,245 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:47:32,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,266 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:47:32,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 55 [2021-06-05 16:47:32,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,380 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:47:32,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:32,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:47:32,402 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 16:47:32,551 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 16:47:32,635 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 16:47:32,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313796264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:32,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:32,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:47:32,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944847046] [2021-06-05 16:47:32,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:47:32,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:47:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:32,636 INFO L87 Difference]: Start difference. First operand 1508 states and 5021 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:33,324 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-05 16:47:33,698 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 16:47:33,893 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:47:34,523 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-05 16:47:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:34,683 INFO L93 Difference]: Finished difference Result 2002 states and 6531 transitions. [2021-06-05 16:47:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:47:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:34,686 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 16:47:34,686 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 16:47:34,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2746.7ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:47:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 16:47:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1511. [2021-06-05 16:47:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.3350993377483444) internal successors, (5036), 1510 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5036 transitions. [2021-06-05 16:47:34,705 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5036 transitions. Word has length 26 [2021-06-05 16:47:34,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:34,705 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5036 transitions. [2021-06-05 16:47:34,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5036 transitions. [2021-06-05 16:47:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:34,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:34,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:34,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 16:47:34,908 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash 762618887, now seen corresponding path program 26 times [2021-06-05 16:47:34,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:34,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948506489] [2021-06-05 16:47:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:35,460 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 16:47:35,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948506489] [2021-06-05 16:47:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948506489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854634154] [2021-06-05 16:47:35,460 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 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 16:47:35,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:35,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:47:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,738 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:47:35,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:47:35,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:35,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:47:35,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,762 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:35,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,772 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:35,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:35,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:47:35,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,798 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:47:35,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:47:35,799 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:35,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:47:35,813 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:47:35,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,837 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:35,838 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,848 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:35,849 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,858 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:47:35,860 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,869 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:35,870 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,880 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:47:35,880 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:35,891 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,899 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:35,900 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:35,906 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:35,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:47:35,907 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:35,988 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:47:35,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:47:35,990 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:47:36,134 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 16:47:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854634154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:36,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:36,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:47:36,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681776] [2021-06-05 16:47:36,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:36,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:36,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:36,135 INFO L87 Difference]: Start difference. First operand 1511 states and 5036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:36,511 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-06-05 16:47:36,831 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-05 16:47:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:37,548 INFO L93 Difference]: Finished difference Result 2063 states and 6723 transitions. [2021-06-05 16:47:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:47:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:37,551 INFO L225 Difference]: With dead ends: 2063 [2021-06-05 16:47:37,551 INFO L226 Difference]: Without dead ends: 2038 [2021-06-05 16:47:37,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1744.4ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:47:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-06-05 16:47:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1517. [2021-06-05 16:47:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3337730870712403) internal successors, (5054), 1516 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5054 transitions. [2021-06-05 16:47:37,570 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5054 transitions. Word has length 26 [2021-06-05 16:47:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:37,570 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5054 transitions. [2021-06-05 16:47:37,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5054 transitions. [2021-06-05 16:47:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:37,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:37,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:37,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:37,772 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2136387655, now seen corresponding path program 42 times [2021-06-05 16:47:37,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:37,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205935778] [2021-06-05 16:47:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:38,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205935778] [2021-06-05 16:47:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205935778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:38,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750652658] [2021-06-05 16:47:38,177 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 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 16:47:38,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:47:38,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:38,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:47:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:38,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 35 [2021-06-05 16:47:38,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2021-06-05 16:47:38,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:47:38,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 16:47:38,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 15 [2021-06-05 16:47:38,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-06-05 16:47:38,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2021-06-05 16:47:38,878 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:47:38,891 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 16:47:38,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:47:38,916 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2021-06-05 16:47:38,929 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2021-06-05 16:47:38,942 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 30 [2021-06-05 16:47:38,955 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 16:47:38,967 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 29 [2021-06-05 16:47:38,978 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:38,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:38,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:38,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 16:47:38,985 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:39,045 INFO L628 ElimStorePlain]: treesize reduction 44, result has 49.4 percent of original size [2021-06-05 16:47:39,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:47:39,047 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:33 [2021-06-05 16:47:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:39,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750652658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:39,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:39,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:47:39,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664704616] [2021-06-05 16:47:39,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:39,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:39,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:39,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:39,095 INFO L87 Difference]: Start difference. First operand 1517 states and 5054 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:40,425 INFO L93 Difference]: Finished difference Result 1955 states and 6355 transitions. [2021-06-05 16:47:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:47:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:40,429 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 16:47:40,429 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 16:47:40,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1554.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:47:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 16:47:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1521. [2021-06-05 16:47:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 16:47:40,446 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 16:47:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:40,447 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 16:47:40,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 16:47:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:40,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:40,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:40,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 16:47:40,649 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1090705077, now seen corresponding path program 43 times [2021-06-05 16:47:40,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:40,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588977214] [2021-06-05 16:47:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:41,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:41,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588977214] [2021-06-05 16:47:41,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588977214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:41,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115315913] [2021-06-05 16:47:41,142 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 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 16:47:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:41,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:41,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:41,548 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 16:47:41,604 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_143], 6=[v_prenex_141, v_prenex_145]} [2021-06-05 16:47:41,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 16:47:41,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 16:47:41,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:41,752 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 16:47:41,752 INFO L628 ElimStorePlain]: treesize reduction 221, result has 44.2 percent of original size [2021-06-05 16:47:41,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:41,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:47:41,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:41,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:41,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:41,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:41,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:41,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:47:41,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:41,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:41,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:41,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:41,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 16:47:41,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:41,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:41,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:47:41,896 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-06-05 16:47:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115315913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:41,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:41,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:47:41,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716642474] [2021-06-05 16:47:41,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:47:41,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:47:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:41,966 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:43,440 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 16:47:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:43,573 INFO L93 Difference]: Finished difference Result 2127 states and 6917 transitions. [2021-06-05 16:47:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:47:43,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:43,577 INFO L225 Difference]: With dead ends: 2127 [2021-06-05 16:47:43,577 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 16:47:43,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2042.2ms TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:47:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 16:47:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1521. [2021-06-05 16:47:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 16:47:43,597 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 16:47:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:43,597 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 16:47:43,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 16:47:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:43,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:43,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:43,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1282,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:43,799 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:43,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080501, now seen corresponding path program 27 times [2021-06-05 16:47:43,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:43,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478687580] [2021-06-05 16:47:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:44,029 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-06-05 16:47:44,220 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 16:47:44,503 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 16:47:44,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:44,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478687580] [2021-06-05 16:47:44,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478687580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:44,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265590205] [2021-06-05 16:47:44,503 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 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 16:47:44,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:47:44,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:44,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:44,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:45,019 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 16:47:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:45,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:45,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:45,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:45,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:45,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:45,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:47:45,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:45,221 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:47:45,221 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.0 percent of original size [2021-06-05 16:47:45,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:45,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:45,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:47:45,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:45,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:45,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:47:45,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:45,321 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.2 percent of original size [2021-06-05 16:47:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:45,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:45,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:45,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:45,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:45,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:45,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:45,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:45,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:45,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:47:45,408 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 16:47:45,478 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 16:47:45,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265590205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:45,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:45,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:47:45,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854180517] [2021-06-05 16:47:45,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:47:45,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:45,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:47:45,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:45,479 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:45,990 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 16:47:46,810 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-06-05 16:47:47,062 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:47:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:47,215 INFO L93 Difference]: Finished difference Result 1978 states and 6388 transitions. [2021-06-05 16:47:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:47:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:47,218 INFO L225 Difference]: With dead ends: 1978 [2021-06-05 16:47:47,218 INFO L226 Difference]: Without dead ends: 1963 [2021-06-05 16:47:47,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2261.3ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:47:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-06-05 16:47:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1529. [2021-06-05 16:47:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 16:47:47,237 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 16:47:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:47,237 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 16:47:47,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 16:47:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:47,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:47,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:47,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:47,439 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:47,440 INFO L82 PathProgramCache]: Analyzing trace with hash -128698937, now seen corresponding path program 44 times [2021-06-05 16:47:47,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:47,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516059683] [2021-06-05 16:47:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:47,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:47,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516059683] [2021-06-05 16:47:47,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516059683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:47,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355717700] [2021-06-05 16:47:47,829 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 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 16:47:47,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:47:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:48,244 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 16:47:48,548 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_170, v_prenex_172, v_prenex_162, v_prenex_164], 5=[A, v_prenex_175, v_prenex_166, v_prenex_168]} [2021-06-05 16:47:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:48,586 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:48,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:47:48,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:49,000 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2021-06-05 16:47:49,001 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 16:47:49,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:49,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:49,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 16:47:49,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:47:49,429 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 151 [2021-06-05 16:47:49,430 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 16:47:49,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:49,459 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:49,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:47:49,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:49,657 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:47:49,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:49,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:49,683 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:47:49,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2021-06-05 16:47:49,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:49,873 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 16:47:49,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:49,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:49,902 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:49,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:47:49,905 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,283 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-06-05 16:47:50,284 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-06-05 16:47:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:50,308 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:47:50,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 16:47:50,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,490 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 16:47:50,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:50,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 40 [2021-06-05 16:47:50,532 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,729 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:47:50,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:50,752 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:50,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:47:50,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,940 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:47:50,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:51,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:47:51,000 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:473, output treesize:269 [2021-06-05 16:47:51,139 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 16:47:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:51,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355717700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:51,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:51,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:47:51,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033101541] [2021-06-05 16:47:51,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:47:51,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:51,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:47:51,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:51,199 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:51,630 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 16:47:51,902 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2021-06-05 16:47:52,324 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 16:47:53,429 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-06-05 16:47:53,641 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 16:47:53,812 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 16:47:54,347 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 16:47:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:54,749 INFO L93 Difference]: Finished difference Result 2479 states and 7802 transitions. [2021-06-05 16:47:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:47:54,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:54,753 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 16:47:54,753 INFO L226 Difference]: Without dead ends: 2435 [2021-06-05 16:47:54,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3594.0ms TimeCoverageRelationStatistics Valid=513, Invalid=2567, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:47:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-05 16:47:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1529. [2021-06-05 16:47:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 16:47:54,774 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 16:47:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:54,774 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 16:47:54,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 16:47:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:54,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:54,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:54,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:54,977 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:54,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1105017781, now seen corresponding path program 45 times [2021-06-05 16:47:54,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:54,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229849515] [2021-06-05 16:47:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:55,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229849515] [2021-06-05 16:47:55,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229849515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429096859] [2021-06-05 16:47:55,383 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 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 16:47:55,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:47:55,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:55,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:47:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,147 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:47:56,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 54 [2021-06-05 16:47:56,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,209 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 16:47:56,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 67 [2021-06-05 16:47:56,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,293 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:47:56,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 16:47:56,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,369 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:47:56,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-06-05 16:47:56,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,432 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-05 16:47:56,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:47:56,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,488 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 16:47:56,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 16:47:56,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,540 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-06-05 16:47:56,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2021-06-05 16:47:56,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,593 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-06-05 16:47:56,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 50 [2021-06-05 16:47:56,594 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,651 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 16:47:56,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 16:47:56,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,731 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 16:47:56,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 77 [2021-06-05 16:47:56,763 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,788 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:47:56,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:47:56,790 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,817 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:47:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:47:56,817 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,843 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:47:56,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:47:56,848 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,874 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:47:56,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:47:56,875 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,903 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:47:56,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 1 [2021-06-05 16:47:56,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:56,922 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:47:56,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 1 [2021-06-05 16:47:56,923 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:57,528 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 96 [2021-06-05 16:47:57,528 INFO L628 ElimStorePlain]: treesize reduction 622, result has 44.9 percent of original size [2021-06-05 16:47:57,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:47:57,558 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1289, output treesize:912 [2021-06-05 16:47:58,103 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-06-05 16:47:58,269 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 16:47:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:58,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429096859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:58,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:58,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:47:58,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869039923] [2021-06-05 16:47:58,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:47:58,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:47:58,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:47:58,347 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:59,560 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 16:47:59,985 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 16:48:00,114 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:48:00,257 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 16:48:00,413 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 16:48:00,777 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 16:48:00,939 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 16:48:01,131 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 16:48:01,390 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:48:01,632 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 16:48:02,165 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-06-05 16:48:02,653 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-06-05 16:48:02,936 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2021-06-05 16:48:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:03,085 INFO L93 Difference]: Finished difference Result 2975 states and 9347 transitions. [2021-06-05 16:48:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:48:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:03,089 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 16:48:03,089 INFO L226 Difference]: Without dead ends: 2945 [2021-06-05 16:48:03,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 5117.2ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:48:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-06-05 16:48:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1537. [2021-06-05 16:48:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.3430989583333335) internal successors, (5135), 1536 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5135 transitions. [2021-06-05 16:48:03,110 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5135 transitions. Word has length 26 [2021-06-05 16:48:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:03,110 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5135 transitions. [2021-06-05 16:48:03,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5135 transitions. [2021-06-05 16:48:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:03,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:03,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:03,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1339,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:03,312 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash -89210125, now seen corresponding path program 28 times [2021-06-05 16:48:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:03,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958173909] [2021-06-05 16:48:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:03,635 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 16:48:03,864 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 16:48:03,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958173909] [2021-06-05 16:48:03,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958173909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395868965] [2021-06-05 16:48:03,865 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 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 16:48:03,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:04,233 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:48:04,431 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2021-06-05 16:48:04,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:04,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:04,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:48:04,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:04,654 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:48:04,654 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.1 percent of original size [2021-06-05 16:48:04,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:04,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:48:04,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:04,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:04,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:04,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:48:04,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:48:04,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:04,812 INFO L628 ElimStorePlain]: treesize reduction 19, result has 83.9 percent of original size [2021-06-05 16:48:04,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:04,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:48:04,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:04,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:04,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:48:04,855 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 16:48:04,928 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 16:48:04,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395868965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:04,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:04,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:48:04,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204836590] [2021-06-05 16:48:04,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:48:04,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:04,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:48:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:48:04,929 INFO L87 Difference]: Start difference. First operand 1537 states and 5135 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:05,492 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 16:48:05,774 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 16:48:06,151 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 16:48:06,417 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 16:48:06,707 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 16:48:06,891 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 16:48:07,183 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-05 16:48:07,424 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-05 16:48:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:07,579 INFO L93 Difference]: Finished difference Result 2083 states and 6714 transitions. [2021-06-05 16:48:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:48:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:07,582 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 16:48:07,582 INFO L226 Difference]: Without dead ends: 2068 [2021-06-05 16:48:07,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3031.5ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:48:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-06-05 16:48:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1540. [2021-06-05 16:48:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 3.3443794671864846) internal successors, (5147), 1539 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 5147 transitions. [2021-06-05 16:48:07,602 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 5147 transitions. Word has length 26 [2021-06-05 16:48:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:07,602 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 5147 transitions. [2021-06-05 16:48:07,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 5147 transitions. [2021-06-05 16:48:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:07,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:07,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:07,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:07,805 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1706742905, now seen corresponding path program 29 times [2021-06-05 16:48:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:07,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540420353] [2021-06-05 16:48:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:08,012 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 16:48:08,177 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 16:48:08,426 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 16:48:08,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:08,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540420353] [2021-06-05 16:48:08,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540420353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:08,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957987131] [2021-06-05 16:48:08,426 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 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 16:48:08,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:48:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:48:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:08,875 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:48:09,120 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:48:09,200 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:48:09,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 16:48:09,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:09,359 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-06-05 16:48:09,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:09,376 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:48:09,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 16:48:09,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:09,528 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-05 16:48:09,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:09,547 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:09,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 16:48:09,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:09,694 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 16:48:09,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:09,711 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:09,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:48:09,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:09,859 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:48:09,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:09,876 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 16:48:09,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:10,041 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:48:10,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:10,058 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:10,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:48:10,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:10,189 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:48:10,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:10,202 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:48:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 16:48:10,204 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:10,322 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:48:10,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:10,337 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:10,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2021-06-05 16:48:10,339 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:10,561 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 16:48:10,562 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-06-05 16:48:10,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:48:10,569 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:687, output treesize:216 [2021-06-05 16:48:10,807 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 16:48:10,891 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 16:48:10,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957987131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:10,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:10,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:48:10,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854762035] [2021-06-05 16:48:10,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:10,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:10,892 INFO L87 Difference]: Start difference. First operand 1540 states and 5147 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:11,454 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 16:48:11,749 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 16:48:12,366 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-06-05 16:48:13,131 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-06-05 16:48:13,609 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2021-06-05 16:48:14,155 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-06-05 16:48:14,766 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 128 [2021-06-05 16:48:15,430 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-06-05 16:48:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:15,984 INFO L93 Difference]: Finished difference Result 2320 states and 7403 transitions. [2021-06-05 16:48:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:48:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:15,987 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 16:48:15,987 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 16:48:15,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5413.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:48:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 16:48:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1535. [2021-06-05 16:48:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3428943937418514) internal successors, (5128), 1534 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5128 transitions. [2021-06-05 16:48:16,008 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5128 transitions. Word has length 26 [2021-06-05 16:48:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:16,008 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5128 transitions. [2021-06-05 16:48:16,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5128 transitions. [2021-06-05 16:48:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:16,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:16,010 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:16,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1516 [2021-06-05 16:48:16,211 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 97294587, now seen corresponding path program 46 times [2021-06-05 16:48:16,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:16,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386861677] [2021-06-05 16:48:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:16,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:16,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386861677] [2021-06-05 16:48:16,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386861677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:16,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326703264] [2021-06-05 16:48:16,730 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 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 16:48:16,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:16,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:16,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:48:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:17,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:48:17,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:48:17,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:48:17,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:48:17,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:48:17,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:48:17,412 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:48:17,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:48:17,429 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:48:17,437 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:48:17,445 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:48:17,453 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:48:17,461 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:48:17,469 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:48:17,477 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:48:17,484 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:17,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:17,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:48:17,489 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:17,531 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 16:48:17,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:48:17,533 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 16:48:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:17,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326703264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:17,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:17,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 16:48:17,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743439894] [2021-06-05 16:48:17,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:48:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:17,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:48:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:48:17,576 INFO L87 Difference]: Start difference. First operand 1535 states and 5128 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:18,283 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 16:48:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:19,851 INFO L93 Difference]: Finished difference Result 3148 states and 9991 transitions. [2021-06-05 16:48:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:48:19,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:19,856 INFO L225 Difference]: With dead ends: 3148 [2021-06-05 16:48:19,856 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 16:48:19,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2389.2ms TimeCoverageRelationStatistics Valid=438, Invalid=1914, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:48:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 16:48:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1630. [2021-06-05 16:48:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.365254757519951) internal successors, (5482), 1629 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5482 transitions. [2021-06-05 16:48:19,883 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5482 transitions. Word has length 26 [2021-06-05 16:48:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:19,883 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5482 transitions. [2021-06-05 16:48:19,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5482 transitions. [2021-06-05 16:48:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:19,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:19,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:20,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1530 [2021-06-05 16:48:20,085 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1930943239, now seen corresponding path program 47 times [2021-06-05 16:48:20,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:20,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700953122] [2021-06-05 16:48:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:20,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700953122] [2021-06-05 16:48:20,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700953122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569291816] [2021-06-05 16:48:20,670 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 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 16:48:20,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:48:20,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:20,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:48:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,391 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:48:21,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 16:48:21,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,412 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:48:21,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,429 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:48:21,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,448 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:48:21,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,476 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:48:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 39 [2021-06-05 16:48:21,478 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,505 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:48:21,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 16:48:21,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,524 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:48:21,524 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,540 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:48:21,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:21,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 60 [2021-06-05 16:48:21,577 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,595 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:48:21,596 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,612 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:48:21,614 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,632 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 1 [2021-06-05 16:48:21,633 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,661 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:48:21,662 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,690 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:48:21,692 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,708 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:48:21,708 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:21,719 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:48:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:48:21,720 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:21,821 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-06-05 16:48:21,822 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.2 percent of original size [2021-06-05 16:48:21,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:48:21,825 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:93 [2021-06-05 16:48:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:22,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569291816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:22,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:22,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 16:48:22,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133246029] [2021-06-05 16:48:22,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:48:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:48:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:48:22,004 INFO L87 Difference]: Start difference. First operand 1630 states and 5482 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:23,501 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 16:48:23,789 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 16:48:24,216 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 16:48:24,351 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 16:48:24,491 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 16:48:24,752 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 16:48:25,019 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 16:48:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:25,152 INFO L93 Difference]: Finished difference Result 3759 states and 11877 transitions. [2021-06-05 16:48:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:48:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:25,157 INFO L225 Difference]: With dead ends: 3759 [2021-06-05 16:48:25,158 INFO L226 Difference]: Without dead ends: 3702 [2021-06-05 16:48:25,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3323.0ms TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:48:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-06-05 16:48:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1786. [2021-06-05 16:48:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.3871148459383753) internal successors, (6046), 1785 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6046 transitions. [2021-06-05 16:48:25,194 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6046 transitions. Word has length 26 [2021-06-05 16:48:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:25,194 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6046 transitions. [2021-06-05 16:48:25,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6046 transitions. [2021-06-05 16:48:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:25,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:25,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:25,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1644,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:25,397 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash -513521361, now seen corresponding path program 30 times [2021-06-05 16:48:25,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:25,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858791467] [2021-06-05 16:48:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:25,653 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 99 [2021-06-05 16:48:25,923 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2021-06-05 16:48:26,126 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 16:48:26,314 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 16:48:26,619 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 16:48:26,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858791467] [2021-06-05 16:48:26,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858791467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980796926] [2021-06-05 16:48:26,620 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 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 16:48:26,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:48:26,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:27,178 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 16:48:27,455 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-06-05 16:48:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,736 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:48:27,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 1 [2021-06-05 16:48:27,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:27,775 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:48:27,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 68 [2021-06-05 16:48:27,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:28,320 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2021-06-05 16:48:28,320 INFO L628 ElimStorePlain]: treesize reduction 697, result has 46.5 percent of original size [2021-06-05 16:48:28,345 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 16:48:28,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:28,545 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 16:48:28,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:28,570 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:28,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2021-06-05 16:48:28,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:28,743 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 16:48:28,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:28,778 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-05 16:48:28,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 74 [2021-06-05 16:48:28,780 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:28,956 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 16:48:28,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:28,983 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:48:28,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-06-05 16:48:28,987 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:29,153 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 16:48:29,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:29,183 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:48:29,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 67 [2021-06-05 16:48:29,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:29,346 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:48:29,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:29,367 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:48:29,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-06-05 16:48:29,369 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:29,529 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:48:29,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:29,561 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:48:29,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 62 [2021-06-05 16:48:29,564 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:29,720 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 16:48:29,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:29,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:48:29,736 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1441, output treesize:516 [2021-06-05 16:48:29,991 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 16:48:30,094 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 16:48:30,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980796926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:30,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:30,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:48:30,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198311902] [2021-06-05 16:48:30,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:48:30,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:30,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:48:30,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:48:30,095 INFO L87 Difference]: Start difference. First operand 1786 states and 6046 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:30,316 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2021-06-05 16:48:30,706 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-06-05 16:48:31,061 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-06-05 16:48:31,521 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 16:48:31,973 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 16:48:32,340 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 16:48:32,631 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:48:32,962 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 16:48:33,636 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-06-05 16:48:34,770 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 241 DAG size of output: 229 [2021-06-05 16:48:35,383 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2021-06-05 16:48:36,391 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2021-06-05 16:48:38,197 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-06-05 16:48:39,757 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 262 DAG size of output: 240 [2021-06-05 16:48:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:40,724 INFO L93 Difference]: Finished difference Result 2363 states and 7775 transitions. [2021-06-05 16:48:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:48:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:40,728 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 16:48:40,728 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 16:48:40,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 10564.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:48:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 16:48:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1795. [2021-06-05 16:48:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 16:48:40,749 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 16:48:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:40,750 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 16:48:40,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 16:48:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:40,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:40,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:40,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1767 [2021-06-05 16:48:40,952 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2131054141, now seen corresponding path program 31 times [2021-06-05 16:48:40,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145076775] [2021-06-05 16:48:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:41,284 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 16:48:41,421 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 16:48:41,519 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 16:48:41,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:41,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145076775] [2021-06-05 16:48:41,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145076775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:41,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86529183] [2021-06-05 16:48:41,520 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 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 16:48:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:42,031 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:48:42,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,165 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:48:42,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 1 [2021-06-05 16:48:42,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,198 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:48:42,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 60 [2021-06-05 16:48:42,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,669 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 177 [2021-06-05 16:48:42,669 INFO L628 ElimStorePlain]: treesize reduction 703, result has 45.7 percent of original size [2021-06-05 16:48:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,694 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 16:48:42,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 16:48:42,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,860 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 16:48:42,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:42,875 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:48:42,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 16:48:42,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:43,018 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-06-05 16:48:43,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:43,037 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:43,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 16:48:43,040 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:43,308 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-05 16:48:43,309 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.3 percent of original size [2021-06-05 16:48:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:43,334 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:48:43,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 16:48:43,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:43,466 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:48:43,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:43,482 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:43,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 16:48:43,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:43,612 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:48:43,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:43,627 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:48:43,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 16:48:43,628 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:43,749 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:48:43,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:43,771 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:48:43,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 16:48:43,773 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:43,884 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:48:43,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:43,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:48:43,891 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 16:48:44,041 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 16:48:44,139 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 16:48:44,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86529183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:44,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:44,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:48:44,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474700731] [2021-06-05 16:48:44,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:48:44,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:48:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:48:44,140 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:44,422 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 16:48:44,605 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 16:48:44,839 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 16:48:45,580 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 16:48:45,911 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:48:46,401 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2021-06-05 16:48:46,643 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 16:48:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:46,822 INFO L93 Difference]: Finished difference Result 2510 states and 8287 transitions. [2021-06-05 16:48:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:48:46,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:46,826 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 16:48:46,826 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 16:48:46,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3202.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:48:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 16:48:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1795. [2021-06-05 16:48:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 16:48:46,851 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 16:48:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:46,851 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 16:48:46,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 16:48:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:46,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:46,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:47,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1810 [2021-06-05 16:48:47,057 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash 473970251, now seen corresponding path program 32 times [2021-06-05 16:48:47,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:47,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128946675] [2021-06-05 16:48:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:47,419 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 16:48:47,533 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 16:48:47,764 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 16:48:47,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:47,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128946675] [2021-06-05 16:48:47,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128946675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61570529] [2021-06-05 16:48:47,765 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 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 16:48:47,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:48:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:48,247 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[v_prenex_239, A, v_prenex_237]} [2021-06-05 16:48:48,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:48,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:48:48,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:48,281 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:48:48,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:48:48,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:48,455 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:48:48,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:48,482 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:48:48,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 16:48:48,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:48,502 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:48,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 58 [2021-06-05 16:48:48,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:48,819 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 16:48:48,819 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.3 percent of original size [2021-06-05 16:48:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:48,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:48,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 16:48:48,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:48,864 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:48,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:48:48,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:49,159 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-05 16:48:49,159 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.4 percent of original size [2021-06-05 16:48:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:49,181 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:48:49,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 16:48:49,183 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:49,202 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:49,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:48:49,204 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:49,426 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 16:48:49,427 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.0 percent of original size [2021-06-05 16:48:49,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:48:49,438 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:641, output treesize:342 [2021-06-05 16:48:49,626 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 16:48:49,878 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 16:48:49,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61570529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:49,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:49,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:48:49,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181707151] [2021-06-05 16:48:49,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:49,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:49,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:49,879 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:50,136 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 30 [2021-06-05 16:48:50,429 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 16:48:50,631 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2021-06-05 16:48:50,904 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 16:48:51,092 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-06-05 16:48:51,314 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 16:48:51,445 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-06-05 16:48:51,717 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-06-05 16:48:51,885 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 16:48:52,273 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 16:48:52,555 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 16:48:52,798 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 16:48:52,961 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 16:48:53,605 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-05 16:48:53,939 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 16:48:54,567 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 16:48:55,231 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2021-06-05 16:48:55,837 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 95 [2021-06-05 16:48:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:56,243 INFO L93 Difference]: Finished difference Result 2613 states and 8461 transitions. [2021-06-05 16:48:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:48:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:56,247 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 16:48:56,247 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 16:48:56,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 6797.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:48:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 16:48:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1779. [2021-06-05 16:48:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.3830146231721034) internal successors, (6015), 1778 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6015 transitions. [2021-06-05 16:48:56,273 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6015 transitions. Word has length 26 [2021-06-05 16:48:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:56,273 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 6015 transitions. [2021-06-05 16:48:56,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6015 transitions. [2021-06-05 16:48:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:56,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:56,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:56,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1844,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:56,476 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash -923228447, now seen corresponding path program 48 times [2021-06-05 16:48:56,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:56,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651420843] [2021-06-05 16:48:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:56,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651420843] [2021-06-05 16:48:56,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651420843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629460270] [2021-06-05 16:48:56,830 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 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 16:48:56,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:48:56,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:56,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:56,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:57,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 16:48:57,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:48:57,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 16:48:57,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 16:48:57,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:48:57,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 16:48:57,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 16:48:57,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:48:57,487 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 16:48:57,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 16:48:57,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 16:48:57,519 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:48:57,530 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 16:48:57,540 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 16:48:57,549 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:48:57,559 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:57,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:57,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 16:48:57,565 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:57,645 INFO L628 ElimStorePlain]: treesize reduction 325, result has 11.2 percent of original size [2021-06-05 16:48:57,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:48:57,646 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1045, output treesize:29 [2021-06-05 16:48:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:57,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629460270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:57,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:57,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:48:57,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739418604] [2021-06-05 16:48:57,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:48:57,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:57,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:48:57,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:48:57,683 INFO L87 Difference]: Start difference. First operand 1779 states and 6015 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:59,174 INFO L93 Difference]: Finished difference Result 2238 states and 7371 transitions. [2021-06-05 16:48:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:48:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:59,178 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 16:48:59,178 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 16:48:59,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:48:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 16:48:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1764. [2021-06-05 16:48:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 16:48:59,198 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 16:48:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:59,199 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 16:48:59,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 16:48:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:59,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:59,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:59,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1871 [2021-06-05 16:48:59,401 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2265419, now seen corresponding path program 49 times [2021-06-05 16:48:59,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:59,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634599425] [2021-06-05 16:48:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:59,608 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 16:48:59,732 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 16:48:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:59,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634599425] [2021-06-05 16:48:59,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634599425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131046236] [2021-06-05 16:48:59,993 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 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 16:49:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:00,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:49:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:00,338 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 16:49:00,397 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_240], 5=[v_prenex_242, v_prenex_244]} [2021-06-05 16:49:00,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:49:00,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:00,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:49:00,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:00,543 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 16:49:00,543 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 16:49:00,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 16:49:00,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:00,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 16:49:00,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:00,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:00,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:00,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 16:49:00,672 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:00,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:00,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:49:00,709 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 16:49:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:00,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131046236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:00,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:00,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:49:00,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216110777] [2021-06-05 16:49:00,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:49:00,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:00,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:49:00,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:49:00,771 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:01,848 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-06-05 16:49:02,682 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 16:49:03,003 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 16:49:03,621 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 16:49:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:03,808 INFO L93 Difference]: Finished difference Result 2440 states and 8027 transitions. [2021-06-05 16:49:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:49:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:03,812 INFO L225 Difference]: With dead ends: 2440 [2021-06-05 16:49:03,812 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 16:49:03,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 3147.1ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:49:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 16:49:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1764. [2021-06-05 16:49:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 16:49:03,835 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 16:49:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:03,835 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 16:49:03,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 16:49:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:03,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:03,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:04,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1977,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:04,038 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:04,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639121, now seen corresponding path program 50 times [2021-06-05 16:49:04,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:04,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863099394] [2021-06-05 16:49:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:04,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:04,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863099394] [2021-06-05 16:49:04,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863099394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:04,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105882224] [2021-06-05 16:49:04,555 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 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 16:49:04,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:49:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:04,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:49:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,855 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-05 16:49:04,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 37 [2021-06-05 16:49:04,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 16:49:04,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,920 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:49:04,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 16:49:04,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,949 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:49:04,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-06-05 16:49:04,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,978 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:49:04,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:49:04,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,998 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:04,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:49:04,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,037 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 16:49:05,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 16:49:05,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,056 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:49:05,057 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,074 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:49:05,075 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,090 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:49:05,092 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,108 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:49:05,109 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,126 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:49:05,127 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,143 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:49:05,144 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,160 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:49:05,161 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,177 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:49:05,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:49:05,178 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,195 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:49:05,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-06-05 16:49:05,206 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,294 INFO L628 ElimStorePlain]: treesize reduction 145, result has 27.5 percent of original size [2021-06-05 16:49:05,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:49:05,295 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:55 [2021-06-05 16:49:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:05,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105882224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:05,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:05,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 16:49:05,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506327575] [2021-06-05 16:49:05,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:49:05,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:05,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:49:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:49:05,405 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:06,330 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-06-05 16:49:06,998 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 16:49:07,184 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 16:49:07,325 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 16:49:07,491 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:49:08,095 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:49:08,399 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-05 16:49:08,661 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 16:49:09,397 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 16:49:10,431 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 16:49:10,567 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 16:49:10,715 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 16:49:10,855 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 16:49:11,079 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 16:49:11,523 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 16:49:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:11,916 INFO L93 Difference]: Finished difference Result 3056 states and 9811 transitions. [2021-06-05 16:49:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:49:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:11,921 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 16:49:11,921 INFO L226 Difference]: Without dead ends: 3009 [2021-06-05 16:49:11,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 6157.6ms TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:49:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-06-05 16:49:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1784. [2021-06-05 16:49:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.37633202467751) internal successors, (6020), 1783 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6020 transitions. [2021-06-05 16:49:11,951 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6020 transitions. Word has length 26 [2021-06-05 16:49:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:11,951 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 6020 transitions. [2021-06-05 16:49:11,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6020 transitions. [2021-06-05 16:49:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:11,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:11,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:12,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1991 [2021-06-05 16:49:12,154 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1573091019, now seen corresponding path program 51 times [2021-06-05 16:49:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:12,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800497478] [2021-06-05 16:49:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:12,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:12,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800497478] [2021-06-05 16:49:12,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800497478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:12,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126766539] [2021-06-05 16:49:12,796 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 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 16:49:12,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:49:12,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:49:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:13,337 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 16:49:13,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:13,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 66 [2021-06-05 16:49:13,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:49:13,884 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 16:49:13,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-06-05 16:49:13,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,077 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 201 DAG size of output: 180 [2021-06-05 16:49:15,078 INFO L628 ElimStorePlain]: treesize reduction 96, result has 91.8 percent of original size [2021-06-05 16:49:15,148 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:49:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 16:49:15,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,214 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-05 16:49:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 44 [2021-06-05 16:49:15,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:16,369 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2021-06-05 16:49:16,370 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-06-05 16:49:16,444 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:49:16,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 16:49:16,470 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:16,522 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-06-05 16:49:16,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 41 [2021-06-05 16:49:16,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:17,771 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 200 DAG size of output: 187 [2021-06-05 16:49:17,772 INFO L628 ElimStorePlain]: treesize reduction 66, result has 94.1 percent of original size [2021-06-05 16:49:17,839 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:49:17,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-06-05 16:49:17,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:17,920 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:49:17,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 16:49:17,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:19,251 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 207 DAG size of output: 184 [2021-06-05 16:49:19,251 INFO L628 ElimStorePlain]: treesize reduction 163, result has 86.3 percent of original size [2021-06-05 16:49:19,324 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:49:19,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 16:49:19,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:19,424 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 16:49:19,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 52 [2021-06-05 16:49:19,430 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:21,397 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 202 DAG size of output: 192 [2021-06-05 16:49:21,398 INFO L628 ElimStorePlain]: treesize reduction 53, result has 95.1 percent of original size [2021-06-05 16:49:21,467 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 16:49:21,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-06-05 16:49:21,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:21,544 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:49:21,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-06-05 16:49:21,583 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:23,454 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 220 DAG size of output: 180 [2021-06-05 16:49:23,455 INFO L628 ElimStorePlain]: treesize reduction 304, result has 75.8 percent of original size [2021-06-05 16:49:23,524 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:49:23,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 16:49:23,548 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:23,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 80 [2021-06-05 16:49:23,723 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:25,217 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 279 DAG size of output: 208 [2021-06-05 16:49:25,218 INFO L628 ElimStorePlain]: treesize reduction 459, result has 68.3 percent of original size [2021-06-05 16:49:25,293 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:49:25,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-06-05 16:49:25,297 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:25,349 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-05 16:49:25,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 49 [2021-06-05 16:49:25,356 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:26,648 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2021-06-05 16:49:26,649 INFO L628 ElimStorePlain]: treesize reduction 8, result has 99.2 percent of original size [2021-06-05 16:49:27,025 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 261 [2021-06-05 16:49:27,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 16:49:27,028 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:5253 [2021-06-05 16:49:28,581 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-06-05 16:49:29,094 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 16:49:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:29,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126766539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:29,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:29,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:49:29,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128944819] [2021-06-05 16:49:29,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:49:29,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:29,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:49:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:49:29,402 INFO L87 Difference]: Start difference. First operand 1784 states and 6020 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:29,884 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2021-06-05 16:49:30,202 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 16:49:30,520 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 16:49:31,307 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2021-06-05 16:49:31,459 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 16:49:32,253 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-05 16:49:33,031 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2021-06-05 16:49:33,341 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-06-05 16:49:34,006 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2021-06-05 16:49:34,200 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-06-05 16:49:34,664 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 16:49:35,246 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-05 16:49:35,712 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 16:49:36,669 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2021-06-05 16:49:37,019 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-06-05 16:49:37,696 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-06-05 16:49:37,962 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 40 [2021-06-05 16:49:38,235 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 48 [2021-06-05 16:49:38,849 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 75 [2021-06-05 16:49:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:38,914 INFO L93 Difference]: Finished difference Result 2817 states and 9172 transitions. [2021-06-05 16:49:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:49:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:38,919 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 16:49:38,919 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 16:49:38,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 11201.9ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:49:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 16:49:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1785. [2021-06-05 16:49:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 16:49:38,944 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 16:49:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:38,944 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 16:49:38,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 16:49:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:38,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:38,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:39,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2020,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:39,147 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:39,147 INFO L82 PathProgramCache]: Analyzing trace with hash 238696335, now seen corresponding path program 52 times [2021-06-05 16:49:39,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:39,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019445949] [2021-06-05 16:49:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:39,562 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 16:49:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:39,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:39,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019445949] [2021-06-05 16:49:39,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019445949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:39,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125666648] [2021-06-05 16:49:39,788 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 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 16:49:39,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:49:39,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:49:39,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:40,333 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 16:49:40,617 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_271, v_prenex_269], 6=[A, v_prenex_273]} [2021-06-05 16:49:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:40,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:40,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 16:49:40,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:40,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 16:49:40,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,817 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 16:49:40,818 INFO L628 ElimStorePlain]: treesize reduction 220, result has 44.2 percent of original size [2021-06-05 16:49:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:49:40,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:40,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 16:49:40,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:40,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:40,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:40,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 30 [2021-06-05 16:49:40,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:41,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:41,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:49:41,008 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:485, output treesize:67 [2021-06-05 16:49:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:41,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125666648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:41,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:41,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:49:41,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711858038] [2021-06-05 16:49:41,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:49:41,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:41,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:49:41,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:49:41,070 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:42,056 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 16:49:42,343 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 16:49:42,516 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 16:49:42,868 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-05 16:49:43,127 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-06-05 16:49:43,332 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-05 16:49:43,898 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 16:49:44,129 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 16:49:44,435 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 16:49:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:44,462 INFO L93 Difference]: Finished difference Result 2300 states and 7575 transitions. [2021-06-05 16:49:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:49:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:44,465 INFO L225 Difference]: With dead ends: 2300 [2021-06-05 16:49:44,466 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:49:44,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 3895.3ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:49:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:49:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1783. [2021-06-05 16:49:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.377665544332211) internal successors, (6019), 1782 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6019 transitions. [2021-06-05 16:49:44,487 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6019 transitions. Word has length 26 [2021-06-05 16:49:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:44,487 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6019 transitions. [2021-06-05 16:49:44,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6019 transitions. [2021-06-05 16:49:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:44,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:44,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:44,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-06-05 16:49:44,691 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:44,691 INFO L82 PathProgramCache]: Analyzing trace with hash -169937649, now seen corresponding path program 53 times [2021-06-05 16:49:44,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:44,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42367735] [2021-06-05 16:49:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:45,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:45,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42367735] [2021-06-05 16:49:45,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42367735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:45,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102726725] [2021-06-05 16:49:45,063 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 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 16:49:45,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:49:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:49:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:45,577 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 16:49:45,864 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 16:49:46,176 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_282, v_prenex_284, v_prenex_285, v_prenex_286, v_prenex_287, v_prenex_288], 6=[v_prenex_283]} [2021-06-05 16:49:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:46,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:46,228 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:49:46,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:49:46,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:46,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:46,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:46,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-06-05 16:49:46,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 16:49:47,341 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 201 DAG size of output: 192 [2021-06-05 16:49:47,342 INFO L628 ElimStorePlain]: treesize reduction 32, result has 97.5 percent of original size [2021-06-05 16:49:47,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:47,381 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:49:47,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 16:49:47,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:47,419 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:49:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 16:49:47,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:48,337 WARN L205 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 178 [2021-06-05 16:49:48,338 INFO L628 ElimStorePlain]: treesize reduction 50, result has 95.8 percent of original size [2021-06-05 16:49:48,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:48,385 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:49:48,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 16:49:48,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:48,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:48,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:48,424 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:49:48,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 41 [2021-06-05 16:49:48,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:49,254 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2021-06-05 16:49:49,254 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.6 percent of original size [2021-06-05 16:49:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:49,291 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:49:49,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 37 [2021-06-05 16:49:49,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:49,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:49,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:49,324 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:49:49,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 16:49:49,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:50,050 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-06-05 16:49:50,051 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.2 percent of original size [2021-06-05 16:49:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,085 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:49:50,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:49:50,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:50,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,122 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:49:50,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 16:49:50,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:50,453 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:49:50,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:50,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,489 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:49:50,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 16:49:50,492 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:50,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:50,508 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:49:50,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:49:50,509 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:51,060 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-06-05 16:49:51,060 INFO L628 ElimStorePlain]: treesize reduction 10, result has 98.7 percent of original size [2021-06-05 16:49:51,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:51,091 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:49:51,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 16:49:51,093 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:51,120 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:49:51,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-06-05 16:49:51,123 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:51,589 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-06-05 16:49:51,589 INFO L628 ElimStorePlain]: treesize reduction 37, result has 94.9 percent of original size [2021-06-05 16:49:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:51,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:51,633 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 16:49:51,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 104 [2021-06-05 16:49:51,644 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:51,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:51,657 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:49:51,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 1 [2021-06-05 16:49:51,658 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:52,052 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-06-05 16:49:52,052 INFO L628 ElimStorePlain]: treesize reduction 68, result has 85.0 percent of original size [2021-06-05 16:49:52,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:49:52,061 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1282, output treesize:291 [2021-06-05 16:49:52,206 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-06-05 16:49:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:52,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102726725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:52,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:52,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:49:52,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208695512] [2021-06-05 16:49:52,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:49:52,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:49:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:49:52,262 INFO L87 Difference]: Start difference. First operand 1783 states and 6019 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:54,243 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:50:00,056 WARN L205 SmtUtils]: Spent 5.60 s on a formula simplification. DAG size of input: 209 DAG size of output: 150 [2021-06-05 16:50:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:00,431 INFO L93 Difference]: Finished difference Result 2524 states and 8353 transitions. [2021-06-05 16:50:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:50:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:00,435 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 16:50:00,435 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 16:50:00,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 8309.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:50:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 16:50:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1785. [2021-06-05 16:50:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 16:50:00,456 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 16:50:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:00,457 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 16:50:00,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 16:50:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:00,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:00,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:00,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2302 [2021-06-05 16:50:00,659 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash 597949447, now seen corresponding path program 54 times [2021-06-05 16:50:00,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:00,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029062171] [2021-06-05 16:50:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:01,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:01,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029062171] [2021-06-05 16:50:01,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029062171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:01,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063621918] [2021-06-05 16:50:01,123 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 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 16:50:01,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:50:01,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:50:01,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:01,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,411 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:50:01,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:50:01,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:01,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 16:50:01,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,493 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:50:01,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,513 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:50:01,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,530 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:50:01,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,547 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:50:01,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,564 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:50:01,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,580 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:50:01,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,597 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:50:01,597 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,614 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:50:01,614 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,628 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:50:01,630 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,644 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:50:01,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,661 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:50:01,662 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,676 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:50:01,677 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,690 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:50:01,691 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:01,710 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:50:01,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:50:01,711 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,878 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-06-05 16:50:01,878 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-06-05 16:50:01,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:50:01,879 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:27 [2021-06-05 16:50:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:01,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063621918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:01,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:01,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 16:50:01,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691195262] [2021-06-05 16:50:01,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:50:01,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:01,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:50:01,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:50:01,949 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:03,264 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-05 16:50:03,673 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-06-05 16:50:03,828 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-06-05 16:50:04,274 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 16:50:04,656 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 16:50:04,876 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 16:50:05,153 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 16:50:05,443 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 16:50:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:06,071 INFO L93 Difference]: Finished difference Result 2886 states and 9372 transitions. [2021-06-05 16:50:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:50:06,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:06,075 INFO L225 Difference]: With dead ends: 2886 [2021-06-05 16:50:06,075 INFO L226 Difference]: Without dead ends: 2841 [2021-06-05 16:50:06,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3918.4ms TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:50:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-05 16:50:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1790. [2021-06-05 16:50:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.377864728898826) internal successors, (6043), 1789 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6043 transitions. [2021-06-05 16:50:06,102 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6043 transitions. Word has length 26 [2021-06-05 16:50:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:06,102 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 6043 transitions. [2021-06-05 16:50:06,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6043 transitions. [2021-06-05 16:50:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:06,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:06,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:06,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2368 [2021-06-05 16:50:06,305 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:06,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1153824785, now seen corresponding path program 33 times [2021-06-05 16:50:06,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:06,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498169777] [2021-06-05 16:50:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:06,706 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 16:50:06,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498169777] [2021-06-05 16:50:06,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498169777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:06,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836339173] [2021-06-05 16:50:06,707 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 16:50:06,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:50:06,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:50:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:07,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:07,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:07,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:07,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:07,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:07,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:07,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:07,604 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 16:50:07,604 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 16:50:07,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:07,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:07,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:50:07,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:07,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:07,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:07,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:07,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:07,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:07,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:50:07,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:07,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:07,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:07,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:50:07,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:07,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:07,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:50:07,832 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 16:50:07,906 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 16:50:07,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836339173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:07,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:07,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:50:07,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252251430] [2021-06-05 16:50:07,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:50:07,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:07,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:50:07,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:50:07,907 INFO L87 Difference]: Start difference. First operand 1790 states and 6043 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:08,885 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 16:50:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:09,160 INFO L93 Difference]: Finished difference Result 2197 states and 7293 transitions. [2021-06-05 16:50:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:50:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:09,164 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 16:50:09,165 INFO L226 Difference]: Without dead ends: 2182 [2021-06-05 16:50:09,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1608.9ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:50:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-06-05 16:50:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1782. [2021-06-05 16:50:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 16:50:09,190 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 16:50:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:09,191 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 16:50:09,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 16:50:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:09,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:09,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:09,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2394,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:09,415 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:09,415 INFO L82 PathProgramCache]: Analyzing trace with hash -824665213, now seen corresponding path program 34 times [2021-06-05 16:50:09,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:09,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166131536] [2021-06-05 16:50:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:09,724 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-06-05 16:50:09,935 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 16:50:09,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166131536] [2021-06-05 16:50:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166131536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252607723] [2021-06-05 16:50:09,935 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 16:50:09,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:50:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,306 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:50:10,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,319 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:50:10,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,338 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:50:10,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 16:50:10,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,350 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:50:10,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,362 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:50:10,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,375 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:50:10,376 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,387 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:50:10,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,398 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:50:10,399 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,411 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-06-05 16:50:10,412 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,422 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:50:10,423 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,438 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:50:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 16:50:10,439 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,453 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:50:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 16:50:10,455 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,473 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:50:10,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-06-05 16:50:10,474 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,485 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:50:10,485 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:10,497 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:10,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2021-06-05 16:50:10,498 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,506 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:50:10,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 16:50:10,508 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:10,578 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.6 percent of original size [2021-06-05 16:50:10,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:50:10,580 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1445, output treesize:46 [2021-06-05 16:50:10,623 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 16:50:10,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252607723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:10,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:10,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:50:10,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67269465] [2021-06-05 16:50:10,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:50:10,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:50:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:10,624 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:11,396 INFO L93 Difference]: Finished difference Result 1968 states and 6539 transitions. [2021-06-05 16:50:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:50:11,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:11,410 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 16:50:11,410 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 16:50:11,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1253.8ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:50:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 16:50:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1791. [2021-06-05 16:50:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.3843575418994414) internal successors, (6058), 1790 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6058 transitions. [2021-06-05 16:50:11,433 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6058 transitions. Word has length 26 [2021-06-05 16:50:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:11,433 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6058 transitions. [2021-06-05 16:50:11,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6058 transitions. [2021-06-05 16:50:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:11,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:11,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:11,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2414,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:11,638 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:11,639 INFO L82 PathProgramCache]: Analyzing trace with hash -992474305, now seen corresponding path program 35 times [2021-06-05 16:50:11,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:11,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536096867] [2021-06-05 16:50:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:11,861 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-06-05 16:50:11,980 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:50:12,219 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 16:50:12,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:12,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536096867] [2021-06-05 16:50:12,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536096867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:12,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599916211] [2021-06-05 16:50:12,220 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 16:50:12,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:50:12,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:12,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:50:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:50:12,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:12,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:50:12,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:50:12,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:12,630 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:12,636 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:12,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:50:12,649 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:50:12,655 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:50:12,662 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:50:12,668 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:12,674 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:12,680 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:12,686 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:12,692 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:12,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:12,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:50:12,697 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:12,766 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-06-05 16:50:12,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:50:12,768 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-06-05 16:50:12,820 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 16:50:12,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599916211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:12,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:12,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:50:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190058322] [2021-06-05 16:50:12,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:12,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:12,821 INFO L87 Difference]: Start difference. First operand 1791 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:13,293 INFO L93 Difference]: Finished difference Result 2115 states and 7050 transitions. [2021-06-05 16:50:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:50:13,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:13,296 INFO L225 Difference]: With dead ends: 2115 [2021-06-05 16:50:13,296 INFO L226 Difference]: Without dead ends: 2100 [2021-06-05 16:50:13,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 966.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:50:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-05 16:50:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1785. [2021-06-05 16:50:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.383968609865471) internal successors, (6037), 1784 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6037 transitions. [2021-06-05 16:50:13,316 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6037 transitions. Word has length 26 [2021-06-05 16:50:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:13,316 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6037 transitions. [2021-06-05 16:50:13,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6037 transitions. [2021-06-05 16:50:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:13,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:13,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:13,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:13,519 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1234976963, now seen corresponding path program 36 times [2021-06-05 16:50:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:13,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012404813] [2021-06-05 16:50:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:13,990 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 16:50:13,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:13,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012404813] [2021-06-05 16:50:13,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012404813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:13,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353993748] [2021-06-05 16:50:13,991 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 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 16:50:14,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:50:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:50:14,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:14,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:50:14,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,392 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:50:14,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,403 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:50:14,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,412 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:14,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,422 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:14,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,435 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:50:14,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:50:14,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:14,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:50:14,449 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,459 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:14,459 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:50:14,470 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:50:14,484 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,494 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:50:14,495 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:50:14,509 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,518 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:14,519 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,529 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:50:14,530 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,540 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:14,542 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:14,551 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:14,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:50:14,551 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:14,684 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 16:50:14,685 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.8 percent of original size [2021-06-05 16:50:14,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:50:14,688 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 16:50:14,833 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 16:50:14,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353993748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:14,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:14,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:50:14,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451423241] [2021-06-05 16:50:14,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:50:14,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:14,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:50:14,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:50:14,834 INFO L87 Difference]: Start difference. First operand 1785 states and 6037 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:15,105 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 16:50:15,450 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 16:50:15,990 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 16:50:16,169 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 16:50:16,538 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 16:50:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:16,703 INFO L93 Difference]: Finished difference Result 2622 states and 8655 transitions. [2021-06-05 16:50:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:50:16,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:16,707 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 16:50:16,707 INFO L226 Difference]: Without dead ends: 2607 [2021-06-05 16:50:16,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2171.7ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:50:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-06-05 16:50:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1782. [2021-06-05 16:50:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 16:50:16,732 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 16:50:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:16,732 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 16:50:16,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 16:50:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:16,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:16,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:16,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2449,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:16,935 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 649627467, now seen corresponding path program 37 times [2021-06-05 16:50:16,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:16,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515028790] [2021-06-05 16:50:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:17,312 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 16:50:17,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:17,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515028790] [2021-06-05 16:50:17,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515028790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:17,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671395759] [2021-06-05 16:50:17,313 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 16:50:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:50:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:17,652 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 16:50:17,727 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:17,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-06-05 16:50:17,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:17,892 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 16:50:17,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:17,911 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:50:17,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 49 [2021-06-05 16:50:17,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:18,068 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:50:18,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:18,085 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:50:18,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-06-05 16:50:18,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:18,237 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 16:50:18,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:18,258 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:18,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 60 [2021-06-05 16:50:18,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:18,406 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:50:18,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:18,426 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 55 [2021-06-05 16:50:18,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:18,566 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 16:50:18,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:18,584 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:18,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2021-06-05 16:50:18,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:18,713 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:50:18,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:18,727 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:50:18,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2021-06-05 16:50:18,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:18,862 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 16:50:18,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:18,877 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:18,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 63 [2021-06-05 16:50:18,878 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:18,994 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:50:18,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:19,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:50:19,002 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:665, output treesize:244 [2021-06-05 16:50:19,162 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 16:50:19,246 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 16:50:19,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671395759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:19,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:19,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:50:19,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720675581] [2021-06-05 16:50:19,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:50:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:19,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:50:19,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:50:19,247 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:19,764 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-06-05 16:50:20,210 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 16:50:20,573 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 16:50:21,027 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-05 16:50:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:21,201 INFO L93 Difference]: Finished difference Result 2302 states and 7609 transitions. [2021-06-05 16:50:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:50:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:21,204 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 16:50:21,204 INFO L226 Difference]: Without dead ends: 2287 [2021-06-05 16:50:21,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2412.3ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:50:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-05 16:50:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1774. [2021-06-05 16:50:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.3756345177664975) internal successors, (5985), 1773 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5985 transitions. [2021-06-05 16:50:21,225 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5985 transitions. Word has length 26 [2021-06-05 16:50:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:21,225 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 5985 transitions. [2021-06-05 16:50:21,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5985 transitions. [2021-06-05 16:50:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:21,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:21,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:21,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2484,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:21,441 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1956490383, now seen corresponding path program 38 times [2021-06-05 16:50:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:21,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512643100] [2021-06-05 16:50:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:21,797 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 16:50:21,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:21,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512643100] [2021-06-05 16:50:21,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512643100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:21,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872328135] [2021-06-05 16:50:21,797 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 16:50:21,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:50:21,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:22,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,064 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:50:22,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:50:22,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:50:22,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,087 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:22,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,097 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:50:22,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:50:22,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,124 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:50:22,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:50:22,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:22,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:50:22,139 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,150 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:50:22,151 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,160 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:22,160 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:22,170 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:50:22,181 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,190 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:22,191 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,200 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:50:22,201 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,210 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:50:22,211 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:22,219 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:22,225 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:22,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:50:22,226 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:22,304 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:50:22,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:50:22,306 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:50:22,431 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 16:50:22,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872328135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:22,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:22,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:50:22,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974116111] [2021-06-05 16:50:22,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:50:22,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:50:22,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:22,432 INFO L87 Difference]: Start difference. First operand 1774 states and 5985 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:23,133 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 16:50:23,338 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:50:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:23,626 INFO L93 Difference]: Finished difference Result 2052 states and 6733 transitions. [2021-06-05 16:50:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:50:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:23,629 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 16:50:23,629 INFO L226 Difference]: Without dead ends: 2031 [2021-06-05 16:50:23,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1369.3ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:50:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-06-05 16:50:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1745. [2021-06-05 16:50:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.371559633027523) internal successors, (5880), 1744 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5880 transitions. [2021-06-05 16:50:23,654 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5880 transitions. Word has length 26 [2021-06-05 16:50:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:23,654 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 5880 transitions. [2021-06-05 16:50:23,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5880 transitions. [2021-06-05 16:50:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:23,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:23,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:23,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2497 [2021-06-05 16:50:23,860 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1231193713, now seen corresponding path program 39 times [2021-06-05 16:50:23,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:23,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476827403] [2021-06-05 16:50:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:24,221 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 16:50:24,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476827403] [2021-06-05 16:50:24,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476827403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540347530] [2021-06-05 16:50:24,221 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 16:50:24,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:50:24,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:50:24,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:24,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:24,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:50:24,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:24,739 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:24,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:50:24,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:24,901 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:50:24,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:24,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:24,924 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:50:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:50:24,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:24,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:24,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 16:50:24,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:25,111 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:50:25,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:25,135 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:50:25,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:50:25,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:25,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:25,155 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:50:25,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 23 [2021-06-05 16:50:25,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:25,308 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:50:25,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:25,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:25,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 16:50:25,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:25,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:25,347 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:50:25,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:50:25,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:25,610 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 16:50:25,611 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.9 percent of original size [2021-06-05 16:50:25,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 16:50:25,633 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:401, output treesize:330 [2021-06-05 16:50:25,805 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 16:50:25,887 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 16:50:25,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540347530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:25,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:25,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:50:25,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541181323] [2021-06-05 16:50:25,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:50:25,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:50:25,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:25,888 INFO L87 Difference]: Start difference. First operand 1745 states and 5880 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:26,784 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 16:50:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:27,011 INFO L93 Difference]: Finished difference Result 1970 states and 6526 transitions. [2021-06-05 16:50:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:50:27,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:27,014 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 16:50:27,014 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 16:50:27,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1488.8ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:50:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 16:50:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1724. [2021-06-05 16:50:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.3743470690655832) internal successors, (5814), 1723 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5814 transitions. [2021-06-05 16:50:27,035 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5814 transitions. Word has length 26 [2021-06-05 16:50:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:27,035 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5814 transitions. [2021-06-05 16:50:27,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5814 transitions. [2021-06-05 16:50:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:27,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:27,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:27,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:27,238 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash 912205891, now seen corresponding path program 40 times [2021-06-05 16:50:27,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:27,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24433705] [2021-06-05 16:50:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:27,551 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 16:50:27,669 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 16:50:27,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:27,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24433705] [2021-06-05 16:50:27,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24433705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:27,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565828778] [2021-06-05 16:50:27,670 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 16:50:27,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:27,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:27,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:50:27,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:28,121 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:50:28,216 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:28,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 52 [2021-06-05 16:50:28,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:28,382 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 16:50:28,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:28,400 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:50:28,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 46 [2021-06-05 16:50:28,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:28,598 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 16:50:28,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:28,618 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:28,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2021-06-05 16:50:28,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:28,800 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 16:50:28,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:28,823 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:50:28,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 16:50:28,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:28,982 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 16:50:28,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:28,997 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:50:28,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:50:28,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:29,169 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:50:29,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:29,188 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:29,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 16:50:29,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:29,319 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:50:29,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:29,337 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:29,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 47 [2021-06-05 16:50:29,340 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:29,626 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-06-05 16:50:29,627 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.5 percent of original size [2021-06-05 16:50:29,642 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:50:29,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 16:50:29,644 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:29,757 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:50:29,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:29,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:50:29,765 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:641, output treesize:216 [2021-06-05 16:50:29,920 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 16:50:30,005 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 16:50:30,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565828778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:30,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:30,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:50:30,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845467586] [2021-06-05 16:50:30,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:50:30,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:50:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:50:30,007 INFO L87 Difference]: Start difference. First operand 1724 states and 5814 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:30,540 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 16:50:30,975 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:50:31,424 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 132 [2021-06-05 16:50:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:31,610 INFO L93 Difference]: Finished difference Result 2315 states and 7617 transitions. [2021-06-05 16:50:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:50:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:31,614 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 16:50:31,614 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 16:50:31,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2105.9ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:50:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 16:50:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1717. [2021-06-05 16:50:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.374708624708625) internal successors, (5791), 1716 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 5791 transitions. [2021-06-05 16:50:31,635 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 5791 transitions. Word has length 26 [2021-06-05 16:50:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:31,635 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 5791 transitions. [2021-06-05 16:50:31,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 5791 transitions. [2021-06-05 16:50:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:31,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:31,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:31,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2560,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:31,838 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:31,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779469, now seen corresponding path program 41 times [2021-06-05 16:50:31,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:31,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080023396] [2021-06-05 16:50:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:32,179 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:50:32,341 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 16:50:32,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:32,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080023396] [2021-06-05 16:50:32,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080023396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:32,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188077492] [2021-06-05 16:50:32,342 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 16:50:32,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:50:32,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:32,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:50:32,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:32,866 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:50:33,155 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2021-06-05 16:50:33,229 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_342, v_prenex_343, v_prenex_344], 3=[A]} [2021-06-05 16:50:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:33,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:33,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:50:33,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:33,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:33,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:33,400 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 16:50:33,400 INFO L628 ElimStorePlain]: treesize reduction 53, result has 81.4 percent of original size [2021-06-05 16:50:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:33,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:33,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:33,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:33,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:33,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:33,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:33,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:50:33,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:33,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:33,556 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:33,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-06-05 16:50:33,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:33,568 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:50:33,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 16:50:33,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:33,648 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-06-05 16:50:33,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:50:33,651 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:333, output treesize:59 [2021-06-05 16:50:33,725 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 16:50:33,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188077492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:33,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:33,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:50:33,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205261423] [2021-06-05 16:50:33,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:50:33,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:33,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:50:33,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:50:33,726 INFO L87 Difference]: Start difference. First operand 1717 states and 5791 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:34,657 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 16:50:35,188 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:50:35,517 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-06-05 16:50:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:35,695 INFO L93 Difference]: Finished difference Result 2241 states and 7399 transitions. [2021-06-05 16:50:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:50:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:35,699 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 16:50:35,699 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 16:50:35,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2577.5ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:50:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 16:50:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1703. [2021-06-05 16:50:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.375440658049354) internal successors, (5745), 1702 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5745 transitions. [2021-06-05 16:50:35,720 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5745 transitions. Word has length 26 [2021-06-05 16:50:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:35,720 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5745 transitions. [2021-06-05 16:50:35,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5745 transitions. [2021-06-05 16:50:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:35,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:35,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:35,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2578,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:35,923 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1720331193, now seen corresponding path program 42 times [2021-06-05 16:50:35,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:35,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581698689] [2021-06-05 16:50:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:36,228 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 16:50:36,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581698689] [2021-06-05 16:50:36,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581698689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779652417] [2021-06-05 16:50:36,228 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 16:50:36,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:50:36,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:36,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:50:36,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:36,726 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:50:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:50:36,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,748 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:50:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:50:36,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:36,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:50:36,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,786 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:50:36,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,798 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:50:36,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,809 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:36,809 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,820 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:36,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,831 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:36,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,842 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:36,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,864 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:50:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:50:36,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,895 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:50:36,896 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,910 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:36,911 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,925 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:50:36,927 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,940 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:50:36,941 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,961 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:50:36,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:50:36,962 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:36,969 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:50:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:50:36,970 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:37,176 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-05 16:50:37,177 INFO L628 ElimStorePlain]: treesize reduction 68, result has 67.1 percent of original size [2021-06-05 16:50:37,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:50:37,184 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:161 [2021-06-05 16:50:37,329 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 16:50:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779652417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:37,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:37,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:50:37,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264751910] [2021-06-05 16:50:37,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:50:37,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:50:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:50:37,330 INFO L87 Difference]: Start difference. First operand 1703 states and 5745 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:38,075 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 16:50:38,373 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:50:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:38,892 INFO L93 Difference]: Finished difference Result 2062 states and 6748 transitions. [2021-06-05 16:50:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:50:38,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:38,895 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 16:50:38,895 INFO L226 Difference]: Without dead ends: 2032 [2021-06-05 16:50:38,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1697.3ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:50:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-06-05 16:50:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1752. [2021-06-05 16:50:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.371216447744146) internal successors, (5903), 1751 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5903 transitions. [2021-06-05 16:50:38,914 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5903 transitions. Word has length 26 [2021-06-05 16:50:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:38,914 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5903 transitions. [2021-06-05 16:50:38,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5903 transitions. [2021-06-05 16:50:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:38,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:38,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:39,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 16:50:39,117 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash 339310983, now seen corresponding path program 43 times [2021-06-05 16:50:39,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:39,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348760004] [2021-06-05 16:50:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:39,479 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-06-05 16:50:39,709 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 16:50:39,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:39,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348760004] [2021-06-05 16:50:39,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348760004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:39,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545457908] [2021-06-05 16:50:39,710 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 16:50:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:39,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:50:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:40,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,016 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:50:40,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:50:40,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,051 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:40,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,062 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:50:40,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:40,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:50:40,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:40,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:50:40,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,101 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:40,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:40,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:50:40,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,126 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:40,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,136 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:50:40,137 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,148 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:50:40,149 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:50:40,160 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,169 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:50:40,171 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:40,181 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,191 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:50:40,191 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-06-05 16:50:40,202 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:40,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:40,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:40,208 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:40,337 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-05 16:50:40,337 INFO L628 ElimStorePlain]: treesize reduction 60, result has 61.3 percent of original size [2021-06-05 16:50:40,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:50:40,340 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 16:50:40,469 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 16:50:40,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545457908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:40,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:40,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:50:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693132797] [2021-06-05 16:50:40,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:50:40,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:40,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:50:40,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:50:40,470 INFO L87 Difference]: Start difference. First operand 1752 states and 5903 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:40,738 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:50:41,116 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 16:50:41,401 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 16:50:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:41,587 INFO L93 Difference]: Finished difference Result 2448 states and 8060 transitions. [2021-06-05 16:50:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:50:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:41,591 INFO L225 Difference]: With dead ends: 2448 [2021-06-05 16:50:41,591 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 16:50:41,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1555.5ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:50:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 16:50:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1749. [2021-06-05 16:50:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.372425629290618) internal successors, (5895), 1748 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5895 transitions. [2021-06-05 16:50:41,614 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5895 transitions. Word has length 26 [2021-06-05 16:50:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:41,614 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5895 transitions. [2021-06-05 16:50:41,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5895 transitions. [2021-06-05 16:50:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:41,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:41,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:41,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:41,817 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1589366837, now seen corresponding path program 44 times [2021-06-05 16:50:41,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:41,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45042293] [2021-06-05 16:50:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:42,207 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-05 16:50:42,334 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 16:50:42,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:42,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45042293] [2021-06-05 16:50:42,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45042293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:42,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568184466] [2021-06-05 16:50:42,334 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 16:50:42,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:42,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:50:42,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:42,812 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:50:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 53 [2021-06-05 16:50:42,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:42,983 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 16:50:42,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:43,012 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:50:43,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-06-05 16:50:43,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:43,339 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2021-06-05 16:50:43,340 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 16:50:43,366 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:50:43,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 16:50:43,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:43,535 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 16:50:43,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:43,560 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:50:43,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 16:50:43,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:43,730 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 16:50:43,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:43,753 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:50:43,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 16:50:43,755 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:43,932 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 16:50:43,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:43,951 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:50:43,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 49 [2021-06-05 16:50:43,953 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:44,111 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:50:44,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:44,129 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:50:44,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-06-05 16:50:44,131 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:44,282 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:50:44,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:44,302 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:50:44,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 16:50:44,306 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:44,450 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:50:44,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:44,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:50:44,477 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:625, output treesize:405 [2021-06-05 16:50:44,671 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 16:50:44,749 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 16:50:44,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568184466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:44,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:44,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:50:44,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002656727] [2021-06-05 16:50:44,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:50:44,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:44,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:50:44,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:44,750 INFO L87 Difference]: Start difference. First operand 1749 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,135 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 16:50:45,326 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-06-05 16:50:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:45,694 INFO L93 Difference]: Finished difference Result 2259 states and 7490 transitions. [2021-06-05 16:50:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:50:45,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:45,697 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 16:50:45,697 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 16:50:45,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1607.7ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:50:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 16:50:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1752. [2021-06-05 16:50:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3757852655625356) internal successors, (5911), 1751 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5911 transitions. [2021-06-05 16:50:45,717 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5911 transitions. Word has length 26 [2021-06-05 16:50:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:45,717 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5911 transitions. [2021-06-05 16:50:45,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5911 transitions. [2021-06-05 16:50:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:45,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:45,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:45,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2662,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:45,920 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash 755189195, now seen corresponding path program 45 times [2021-06-05 16:50:45,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:45,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368390480] [2021-06-05 16:50:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:46,277 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 16:50:46,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:46,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368390480] [2021-06-05 16:50:46,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368390480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:46,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073343506] [2021-06-05 16:50:46,277 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 16:50:46,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:50:46,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:50:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:46,823 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:50:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 16:50:46,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:47,298 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2021-06-05 16:50:47,299 INFO L628 ElimStorePlain]: treesize reduction 60, result has 91.1 percent of original size [2021-06-05 16:50:47,324 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:50:47,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-06-05 16:50:47,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:47,554 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-06-05 16:50:47,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:47,579 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:50:47,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 16:50:47,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:47,800 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 16:50:47,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:47,827 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:50:47,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 16:50:47,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:48,285 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2021-06-05 16:50:48,285 INFO L628 ElimStorePlain]: treesize reduction 13, result has 97.7 percent of original size [2021-06-05 16:50:48,315 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:50:48,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:50:48,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:48,733 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-06-05 16:50:48,734 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 16:50:48,759 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:50:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 51 [2021-06-05 16:50:48,762 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:49,156 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-06-05 16:50:49,157 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.2 percent of original size [2021-06-05 16:50:49,180 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:50:49,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 16:50:49,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:49,371 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:50:49,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:49,390 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:50:49,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 47 [2021-06-05 16:50:49,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:49,571 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:50:49,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:49,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:50:49,599 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:673, output treesize:432 [2021-06-05 16:50:49,846 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 16:50:49,932 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 16:50:49,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073343506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:49,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:49,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:50:49,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200842443] [2021-06-05 16:50:49,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:49,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:49,933 INFO L87 Difference]: Start difference. First operand 1752 states and 5911 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:50,459 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 16:50:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:50,966 INFO L93 Difference]: Finished difference Result 2323 states and 7689 transitions. [2021-06-05 16:50:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:50:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:50,970 INFO L225 Difference]: With dead ends: 2323 [2021-06-05 16:50:50,970 INFO L226 Difference]: Without dead ends: 2308 [2021-06-05 16:50:50,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1549.0ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:50:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-06-05 16:50:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1770. [2021-06-05 16:50:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.3719615602035047) internal successors, (5965), 1769 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 5965 transitions. [2021-06-05 16:50:50,993 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 5965 transitions. Word has length 26 [2021-06-05 16:50:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:50,994 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 5965 transitions. [2021-06-05 16:50:50,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 5965 transitions. [2021-06-05 16:50:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:50,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:50,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:51,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:51,197 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1554530479, now seen corresponding path program 46 times [2021-06-05 16:50:51,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:51,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284145899] [2021-06-05 16:50:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:51,584 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 16:50:51,734 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 16:50:51,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284145899] [2021-06-05 16:50:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284145899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219709028] [2021-06-05 16:50:51,734 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 16:50:51,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:51,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:51,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:50:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:52,230 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:50:52,443 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2021-06-05 16:50:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:52,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:52,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:52,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:52,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:52,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:50:52,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:52,651 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 16:50:52,652 INFO L628 ElimStorePlain]: treesize reduction 73, result has 65.9 percent of original size [2021-06-05 16:50:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:52,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:50:52,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:52,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:52,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:52,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:52,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:52,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:52,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:50:52,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:52,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:52,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:50:52,788 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:61 [2021-06-05 16:50:52,857 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 16:50:52,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219709028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:52,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:52,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:50:52,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895317698] [2021-06-05 16:50:52,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:50:52,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:50:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:50:52,858 INFO L87 Difference]: Start difference. First operand 1770 states and 5965 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:53,150 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 16:50:53,761 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:50:54,021 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-05 16:50:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:54,139 INFO L93 Difference]: Finished difference Result 2217 states and 7354 transitions. [2021-06-05 16:50:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:50:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:54,142 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 16:50:54,142 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 16:50:54,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1986.2ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:50:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 16:50:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1791. [2021-06-05 16:50:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.368715083798883) internal successors, (6030), 1790 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6030 transitions. [2021-06-05 16:50:54,162 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6030 transitions. Word has length 26 [2021-06-05 16:50:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:54,162 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6030 transitions. [2021-06-05 16:50:54,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6030 transitions. [2021-06-05 16:50:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:54,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:54,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:54,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-06-05 16:50:54,365 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash -63002301, now seen corresponding path program 47 times [2021-06-05 16:50:54,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:54,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518062262] [2021-06-05 16:50:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:54,747 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 16:50:54,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:54,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518062262] [2021-06-05 16:50:54,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518062262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:54,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373504874] [2021-06-05 16:50:54,747 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 16:50:54,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:50:54,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:54,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:50:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,002 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:50:55,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:50:55,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:55,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:50:55,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,039 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:55,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,049 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:50:55,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:55,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:50:55,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,075 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:50:55,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:50:55,076 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:55,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:50:55,089 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:50:55,100 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,109 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:50:55,110 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,119 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:50:55,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,129 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:50:55,130 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,139 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:50:55,140 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:50:55,150 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,159 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:50:55,160 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:50:55,169 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:55,174 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:55,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:50:55,175 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:55,253 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:50:55,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:50:55,254 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:50:55,390 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 16:50:55,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373504874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:55,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:55,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:50:55,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645671982] [2021-06-05 16:50:55,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:50:55,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:55,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:50:55,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:55,390 INFO L87 Difference]: Start difference. First operand 1791 states and 6030 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:55,769 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 16:50:56,265 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 16:50:56,413 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 16:50:56,654 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 16:50:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:57,009 INFO L93 Difference]: Finished difference Result 2500 states and 8240 transitions. [2021-06-05 16:50:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:50:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:57,013 INFO L225 Difference]: With dead ends: 2500 [2021-06-05 16:50:57,013 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 16:50:57,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1771.9ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:50:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 16:50:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1788. [2021-06-05 16:50:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.369893676552882) internal successors, (6022), 1787 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6022 transitions. [2021-06-05 16:50:57,035 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6022 transitions. Word has length 26 [2021-06-05 16:50:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:57,036 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6022 transitions. [2021-06-05 16:50:57,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6022 transitions. [2021-06-05 16:50:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:57,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:57,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:57,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2742 [2021-06-05 16:50:57,240 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:57,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1752945205, now seen corresponding path program 48 times [2021-06-05 16:50:57,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:57,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078264895] [2021-06-05 16:50:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:57,662 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 16:50:57,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:57,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078264895] [2021-06-05 16:50:57,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078264895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:57,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322850473] [2021-06-05 16:50:57,663 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 16:50:57,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:50:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:50:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:57,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:57,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:57,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:57,984 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:57,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 16:50:57,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:57,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:57,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:57,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:58,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 16:50:58,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,017 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:50:58,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 16:50:58,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,030 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 16:50:58,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,043 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:50:58,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,057 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:50:58,057 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,071 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:50:58,072 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,087 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:50:58,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:50:58,088 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,102 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:50:58,103 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:50:58,117 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,129 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 16:50:58,129 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,142 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:50:58,142 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:50:58,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 16:50:58,159 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,173 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:50:58,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 16:50:58,174 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:50:58,185 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:50:58,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:50:58,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:50:58,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:50:58,193 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:50:58,269 INFO L628 ElimStorePlain]: treesize reduction 49, result has 63.7 percent of original size [2021-06-05 16:50:58,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:50:58,270 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 16:50:58,405 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 16:50:58,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322850473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:58,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:58,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:50:58,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861534037] [2021-06-05 16:50:58,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:50:58,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:50:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:58,406 INFO L87 Difference]: Start difference. First operand 1788 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:59,209 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2021-06-05 16:50:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:59,616 INFO L93 Difference]: Finished difference Result 2414 states and 7934 transitions. [2021-06-05 16:50:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:50:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:50:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:59,620 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 16:50:59,620 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 16:50:59,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1430.9ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:50:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 16:50:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1811. [2021-06-05 16:50:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 16:50:59,642 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 16:50:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:59,642 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 16:50:59,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 16:50:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:50:59,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:59,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:59,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2753,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:59,845 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash 731595527, now seen corresponding path program 49 times [2021-06-05 16:50:59,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:59,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436270281] [2021-06-05 16:50:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:00,201 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 16:51:00,339 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 16:51:00,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:00,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436270281] [2021-06-05 16:51:00,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436270281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:00,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844383916] [2021-06-05 16:51:00,340 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 16:51:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:00,790 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_390, v_prenex_388, v_prenex_389], 3=[A]} [2021-06-05 16:51:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:00,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:51:00,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:00,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:00,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:51:00,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:51:00,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:00,977 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:51:00,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:00,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:00,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:51:00,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:01,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:01,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:51:01,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:01,130 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:51:01,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:01,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:01,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:51:01,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:01,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:01,156 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:51:01,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:51:01,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:01,383 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 16:51:01,384 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.0 percent of original size [2021-06-05 16:51:01,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:01,401 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:51:01,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 45 [2021-06-05 16:51:01,403 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:01,416 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:51:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-06-05 16:51:01,418 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:01,594 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 16:51:01,595 INFO L628 ElimStorePlain]: treesize reduction 32, result has 85.1 percent of original size [2021-06-05 16:51:01,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:51:01,601 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:442, output treesize:160 [2021-06-05 16:51:01,793 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 16:51:01,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844383916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:01,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:01,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:51:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984791604] [2021-06-05 16:51:01,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:01,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:01,794 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:02,503 INFO L93 Difference]: Finished difference Result 2322 states and 7708 transitions. [2021-06-05 16:51:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:51:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:02,507 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 16:51:02,507 INFO L226 Difference]: Without dead ends: 2307 [2021-06-05 16:51:02,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1229.4ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:51:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-05 16:51:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1811. [2021-06-05 16:51:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 16:51:02,529 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 16:51:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:02,529 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 16:51:02,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 16:51:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:02,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:02,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:02,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2772 [2021-06-05 16:51:02,731 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash 396904007, now seen corresponding path program 55 times [2021-06-05 16:51:02,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:02,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120072819] [2021-06-05 16:51:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:03,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:03,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120072819] [2021-06-05 16:51:03,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120072819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:03,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781969599] [2021-06-05 16:51:03,244 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 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 16:51:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:03,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:03,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,700 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 16:51:03,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,727 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:51:03,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 16:51:03,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,745 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 16:51:03,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,765 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 16:51:03,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,784 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:51:03,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,801 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 16:51:03,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,820 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 16:51:03,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,838 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 16:51:03,839 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,857 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 16:51:03,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,876 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 16:51:03,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,894 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 16:51:03,895 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,916 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:51:03,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,943 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:51:03,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 16:51:03,944 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,962 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:51:03,963 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,979 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:03,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 16:51:03,981 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:03,987 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:51:03,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 44 [2021-06-05 16:51:03,988 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:04,030 INFO L628 ElimStorePlain]: treesize reduction 45, result has 47.7 percent of original size [2021-06-05 16:51:04,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:51:04,031 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 16:51:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:04,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781969599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:04,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:04,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:51:04,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890955829] [2021-06-05 16:51:04,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:04,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:04,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:04,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:04,067 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:04,754 INFO L93 Difference]: Finished difference Result 2373 states and 7573 transitions. [2021-06-05 16:51:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:51:04,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:04,758 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 16:51:04,758 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 16:51:04,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1063.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:51:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 16:51:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1833. [2021-06-05 16:51:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.3717248908296944) internal successors, (6177), 1832 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6177 transitions. [2021-06-05 16:51:04,781 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6177 transitions. Word has length 26 [2021-06-05 16:51:04,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:04,781 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6177 transitions. [2021-06-05 16:51:04,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:04,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6177 transitions. [2021-06-05 16:51:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:04,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:04,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:04,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2801 [2021-06-05 16:51:04,984 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1464778571, now seen corresponding path program 56 times [2021-06-05 16:51:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:04,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116547529] [2021-06-05 16:51:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:05,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:05,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116547529] [2021-06-05 16:51:05,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116547529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:05,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882157023] [2021-06-05 16:51:05,329 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 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 16:51:05,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:05,638 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 16:51:05,693 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_391, v_prenex_395], 5=[A, v_prenex_393]} [2021-06-05 16:51:05,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:51:05,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 12 [2021-06-05 16:51:05,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:05,841 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 16:51:05,842 INFO L628 ElimStorePlain]: treesize reduction 199, result has 46.8 percent of original size [2021-06-05 16:51:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:51:05,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:05,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 24 [2021-06-05 16:51:05,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:05,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:05,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:05,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 16:51:05,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:05,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:05,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:51:05,986 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:445, output treesize:55 [2021-06-05 16:51:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:06,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882157023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:06,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:06,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:51:06,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851281916] [2021-06-05 16:51:06,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:06,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:06,047 INFO L87 Difference]: Start difference. First operand 1833 states and 6177 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:06,781 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:51:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:06,909 INFO L93 Difference]: Finished difference Result 2211 states and 7333 transitions. [2021-06-05 16:51:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:51:06,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:06,912 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 16:51:06,912 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 16:51:06,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1019.4ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:51:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 16:51:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1833. [2021-06-05 16:51:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 16:51:06,935 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 16:51:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:06,935 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 16:51:06,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 16:51:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:06,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:06,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:07,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2859,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:07,139 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash -192487861, now seen corresponding path program 57 times [2021-06-05 16:51:07,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:07,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436083928] [2021-06-05 16:51:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:07,513 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 16:51:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:07,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:07,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436083928] [2021-06-05 16:51:07,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436083928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:07,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359987033] [2021-06-05 16:51:07,620 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 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 16:51:07,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:51:07,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:07,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:07,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:08,127 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 16:51:08,408 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_408, v_prenex_409], 6=[v_prenex_404, v_prenex_405, A, v_prenex_407, v_prenex_411, v_prenex_413]} [2021-06-05 16:51:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:08,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:08,451 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:51:08,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2021-06-05 16:51:08,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:08,489 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:51:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 16:51:08,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:09,496 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 227 DAG size of output: 221 [2021-06-05 16:51:09,497 INFO L628 ElimStorePlain]: treesize reduction 38, result has 97.9 percent of original size [2021-06-05 16:51:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:09,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:09,545 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:51:09,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 16:51:09,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:09,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:09,578 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 16:51:09,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 16:51:09,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:10,054 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2021-06-05 16:51:10,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:10,134 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 16:51:10,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 85 [2021-06-05 16:51:10,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:10,171 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-05 16:51:10,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 70 [2021-06-05 16:51:10,173 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:10,614 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-06-05 16:51:10,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:10,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:10,658 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:51:10,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 16:51:10,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:10,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:10,676 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:51:10,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:51:10,677 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:11,056 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 16:51:11,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:11,095 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:51:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 84 [2021-06-05 16:51:11,099 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:11,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:11,123 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:51:11,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 16:51:11,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:11,797 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2021-06-05 16:51:11,798 INFO L628 ElimStorePlain]: treesize reduction 12, result has 98.9 percent of original size [2021-06-05 16:51:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:11,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:11,833 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-06-05 16:51:11,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 71 [2021-06-05 16:51:11,835 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:11,873 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:51:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 162 treesize of output 96 [2021-06-05 16:51:11,881 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:12,440 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2021-06-05 16:51:12,440 INFO L628 ElimStorePlain]: treesize reduction 34, result has 96.0 percent of original size [2021-06-05 16:51:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:12,478 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:51:12,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 16:51:12,481 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:12,493 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:51:12,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:51:12,494 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:12,711 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:51:12,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:12,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:12,747 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:51:12,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 78 [2021-06-05 16:51:12,752 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:12,778 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 16:51:12,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 87 [2021-06-05 16:51:12,782 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:13,129 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 16:51:13,129 INFO L628 ElimStorePlain]: treesize reduction 66, result has 83.2 percent of original size [2021-06-05 16:51:13,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 16:51:13,137 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1858, output treesize:310 [2021-06-05 16:51:13,302 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-06-05 16:51:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359987033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:13,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:13,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:51:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104480329] [2021-06-05 16:51:13,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:51:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:51:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:51:13,352 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:14,371 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:51:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:14,501 INFO L93 Difference]: Finished difference Result 2363 states and 7827 transitions. [2021-06-05 16:51:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:51:14,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:14,505 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 16:51:14,505 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 16:51:14,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1862.8ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:51:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 16:51:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1833. [2021-06-05 16:51:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 16:51:14,527 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 16:51:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:14,527 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 16:51:14,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 16:51:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:14,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:14,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:14,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2873,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:14,730 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1845763381, now seen corresponding path program 50 times [2021-06-05 16:51:14,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:14,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615843305] [2021-06-05 16:51:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:15,194 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 16:51:15,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:15,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615843305] [2021-06-05 16:51:15,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615843305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:15,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087826628] [2021-06-05 16:51:15,194 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 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 16:51:15,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:15,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:51:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,484 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:51:15,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:51:15,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:15,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:51:15,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,507 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:51:15,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:51:15,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:15,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:51:15,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,543 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:51:15,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:51:15,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:51:15,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:51:15,569 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,578 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:51:15,579 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:51:15,591 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,601 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:51:15,603 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,614 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:51:15,615 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,625 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:51:15,626 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,636 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:51:15,636 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,645 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:51:15,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:15,651 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:51:15,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:51:15,652 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:15,730 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:51:15,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:51:15,731 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:51:15,858 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 16:51:15,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087826628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:15,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:15,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:51:15,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99684726] [2021-06-05 16:51:15,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:51:15,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:51:15,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:51:15,859 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:16,290 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 16:51:17,016 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-05 16:51:17,273 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 16:51:17,501 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 16:51:17,694 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 16:51:17,997 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-05 16:51:18,176 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-05 16:51:18,612 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:51:18,921 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 16:51:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:18,993 INFO L93 Difference]: Finished difference Result 2484 states and 8143 transitions. [2021-06-05 16:51:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:51:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:18,997 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 16:51:18,997 INFO L226 Difference]: Without dead ends: 2469 [2021-06-05 16:51:18,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3000.2ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:51:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-05 16:51:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1840. [2021-06-05 16:51:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.368678629690049) internal successors, (6195), 1839 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6195 transitions. [2021-06-05 16:51:19,021 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6195 transitions. Word has length 26 [2021-06-05 16:51:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:19,021 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6195 transitions. [2021-06-05 16:51:19,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6195 transitions. [2021-06-05 16:51:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:19,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:19,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:19,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2936,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:19,224 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:19,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash -295381817, now seen corresponding path program 58 times [2021-06-05 16:51:19,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:19,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672726537] [2021-06-05 16:51:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:19,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:19,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672726537] [2021-06-05 16:51:19,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672726537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:19,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547081298] [2021-06-05 16:51:19,539 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 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 16:51:19,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:19,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:51:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:51:20,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:51:20,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:51:20,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:51:20,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:51:20,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:51:20,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:51:20,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:51:20,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:51:20,219 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:51:20,227 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:51:20,236 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:51:20,244 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:51:20,253 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:51:20,261 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:51:20,270 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:20,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:20,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:51:20,275 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,299 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 16:51:20,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:20,300 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 16:51:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:20,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547081298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:20,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:20,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:51:20,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294669845] [2021-06-05 16:51:20,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:51:20,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:20,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:51:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:20,335 INFO L87 Difference]: Start difference. First operand 1840 states and 6195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:21,229 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:51:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:22,080 INFO L93 Difference]: Finished difference Result 2777 states and 8773 transitions. [2021-06-05 16:51:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:51:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:22,084 INFO L225 Difference]: With dead ends: 2777 [2021-06-05 16:51:22,084 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 16:51:22,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1641.4ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:51:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 16:51:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1885. [2021-06-05 16:51:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.379511677282378) internal successors, (6367), 1884 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6367 transitions. [2021-06-05 16:51:22,109 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6367 transitions. Word has length 26 [2021-06-05 16:51:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:22,109 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6367 transitions. [2021-06-05 16:51:22,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6367 transitions. [2021-06-05 16:51:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:22,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:22,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:22,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2947,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:22,312 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash -69388293, now seen corresponding path program 59 times [2021-06-05 16:51:22,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:22,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910642019] [2021-06-05 16:51:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:22,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:22,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910642019] [2021-06-05 16:51:22,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910642019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:22,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792492178] [2021-06-05 16:51:22,551 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 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 16:51:22,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:23,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 16:51:23,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:51:23,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 16:51:23,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 16:51:23,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 16:51:23,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 16:51:23,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:51:23,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 16:51:23,209 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 16:51:23,219 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:51:23,228 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 16:51:23,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 16:51:23,274 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 16:51:23,284 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 16:51:23,294 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:51:23,303 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:51:23,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:51:23,310 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:23,391 INFO L628 ElimStorePlain]: treesize reduction 349, result has 11.9 percent of original size [2021-06-05 16:51:23,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:51:23,393 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-06-05 16:51:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:23,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792492178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:23,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:23,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:51:23,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517205925] [2021-06-05 16:51:23,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:23,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:23,436 INFO L87 Difference]: Start difference. First operand 1885 states and 6367 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:24,818 INFO L93 Difference]: Finished difference Result 3099 states and 9931 transitions. [2021-06-05 16:51:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:51:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:24,823 INFO L225 Difference]: With dead ends: 3099 [2021-06-05 16:51:24,823 INFO L226 Difference]: Without dead ends: 3069 [2021-06-05 16:51:24,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1401.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:51:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-05 16:51:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1905. [2021-06-05 16:51:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.3891806722689077) internal successors, (6453), 1904 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6453 transitions. [2021-06-05 16:51:24,851 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6453 transitions. Word has length 26 [2021-06-05 16:51:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:24,851 INFO L482 AbstractCegarLoop]: Abstraction has 1905 states and 6453 transitions. [2021-06-05 16:51:24,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6453 transitions. [2021-06-05 16:51:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:24,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:24,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:25,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3053 [2021-06-05 16:51:25,054 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:25,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1764260359, now seen corresponding path program 60 times [2021-06-05 16:51:25,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:25,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048335091] [2021-06-05 16:51:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:25,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048335091] [2021-06-05 16:51:25,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048335091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891161514] [2021-06-05 16:51:25,352 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 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 16:51:25,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:51:25,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:51:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:25,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,627 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:51:25,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 16:51:25,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:25,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 16:51:25,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,693 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:51:25,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-06-05 16:51:25,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,724 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:51:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-06-05 16:51:25,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,762 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:51:25,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:51:25,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,789 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:25,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:51:25,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,836 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 16:51:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 16:51:25,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,861 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:51:25,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,891 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:51:25,892 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,913 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:25,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:51:25,916 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,937 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:51:25,939 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,962 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:25,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:51:25,964 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,987 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:25,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:51:25,988 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:26,011 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:26,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:51:26,012 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:26,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:26,034 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:51:26,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:51:26,035 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:26,059 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 16:51:26,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 35 [2021-06-05 16:51:26,065 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:26,172 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-06-05 16:51:26,172 INFO L628 ElimStorePlain]: treesize reduction 130, result has 35.0 percent of original size [2021-06-05 16:51:26,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:51:26,173 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:70 [2021-06-05 16:51:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891161514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:26,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:26,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:51:26,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207922305] [2021-06-05 16:51:26,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:51:26,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:51:26,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:26,284 INFO L87 Difference]: Start difference. First operand 1905 states and 6453 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:26,904 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:51:27,828 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 16:51:27,986 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 16:51:28,114 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 16:51:28,411 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:51:28,609 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 16:51:28,898 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 16:51:29,204 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 16:51:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:29,371 INFO L93 Difference]: Finished difference Result 2960 states and 9357 transitions. [2021-06-05 16:51:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:51:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:29,375 INFO L225 Difference]: With dead ends: 2960 [2021-06-05 16:51:29,375 INFO L226 Difference]: Without dead ends: 2916 [2021-06-05 16:51:29,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2945.1ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:51:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-06-05 16:51:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1933. [2021-06-05 16:51:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.391821946169772) internal successors, (6553), 1932 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6553 transitions. [2021-06-05 16:51:29,401 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6553 transitions. Word has length 26 [2021-06-05 16:51:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:29,402 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6553 transitions. [2021-06-05 16:51:29,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6553 transitions. [2021-06-05 16:51:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:29,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:29,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:29,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 16:51:29,604 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash -680204241, now seen corresponding path program 51 times [2021-06-05 16:51:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:29,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966022046] [2021-06-05 16:51:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:29,791 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-06-05 16:51:29,916 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 16:51:30,034 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 16:51:30,216 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 16:51:30,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:30,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966022046] [2021-06-05 16:51:30,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966022046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:30,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672932329] [2021-06-05 16:51:30,216 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 16:51:30,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:51:30,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:30,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:51:30,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:30,730 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 16:51:31,034 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 102 [2021-06-05 16:51:31,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:31,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:31,180 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:51:31,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:51:31,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:31,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:31,200 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:51:31,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 46 [2021-06-05 16:51:31,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:31,384 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-05 16:51:31,384 INFO L628 ElimStorePlain]: treesize reduction 291, result has 43.3 percent of original size [2021-06-05 16:51:31,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:31,396 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:51:31,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 16:51:31,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:31,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:31,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:31,480 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:51:31,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:51:31,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:31,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:31,557 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:51:31,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:51:31,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:31,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:31,620 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:51:31,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 16:51:31,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:31,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:31,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:51:31,672 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:627, output treesize:83 [2021-06-05 16:51:31,750 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 16:51:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672932329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:31,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:31,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:51:31,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218093984] [2021-06-05 16:51:31,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:51:31,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:31,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:51:31,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:31,751 INFO L87 Difference]: Start difference. First operand 1933 states and 6553 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:32,385 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 16:51:32,838 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 16:51:33,210 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 16:51:33,649 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 16:51:33,864 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 16:51:34,481 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 134 [2021-06-05 16:51:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:34,670 INFO L93 Difference]: Finished difference Result 2443 states and 8134 transitions. [2021-06-05 16:51:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:51:34,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:34,673 INFO L225 Difference]: With dead ends: 2443 [2021-06-05 16:51:34,673 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 16:51:34,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3337.1ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:51:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 16:51:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1948. [2021-06-05 16:51:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.389830508474576) internal successors, (6600), 1947 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6600 transitions. [2021-06-05 16:51:34,696 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6600 transitions. Word has length 26 [2021-06-05 16:51:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:34,696 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6600 transitions. [2021-06-05 16:51:34,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6600 transitions. [2021-06-05 16:51:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:34,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:34,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:34,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3180 [2021-06-05 16:51:34,901 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1997230275, now seen corresponding path program 52 times [2021-06-05 16:51:34,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:34,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342176229] [2021-06-05 16:51:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:35,385 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 16:51:35,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:35,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342176229] [2021-06-05 16:51:35,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342176229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:35,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564366025] [2021-06-05 16:51:35,385 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 16:51:35,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:35,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:35,963 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:51:36,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:36,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:51:36,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:36,188 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 16:51:36,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:36,202 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:51:36,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:51:36,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:36,343 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:51:36,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:36,358 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:51:36,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:51:36,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:36,493 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 16:51:36,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:36,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:51:36,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:36,641 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:51:36,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:36,654 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:51:36,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:51:36,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:36,785 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:51:36,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:36,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:51:36,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:36,926 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:51:36,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:36,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:36,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:51:36,941 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:37,057 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:51:37,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:37,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:37,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:37,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:51:37,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:37,185 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:51:37,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:37,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:51:37,195 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 16:51:37,360 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 16:51:37,444 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 16:51:37,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564366025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:37,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:37,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:51:37,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994591157] [2021-06-05 16:51:37,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:51:37,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:51:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:37,444 INFO L87 Difference]: Start difference. First operand 1948 states and 6600 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:37,807 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:51:38,090 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-06-05 16:51:38,478 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 16:51:38,615 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 16:51:38,913 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 16:51:39,266 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:51:39,689 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-05 16:51:39,990 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 16:51:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:40,208 INFO L93 Difference]: Finished difference Result 2746 states and 9083 transitions. [2021-06-05 16:51:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:51:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:40,212 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 16:51:40,212 INFO L226 Difference]: Without dead ends: 2731 [2021-06-05 16:51:40,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3173.9ms TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:51:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-06-05 16:51:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1943. [2021-06-05 16:51:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 3.388774459320288) internal successors, (6581), 1942 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 6581 transitions. [2021-06-05 16:51:40,236 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 6581 transitions. Word has length 26 [2021-06-05 16:51:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:40,236 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 6581 transitions. [2021-06-05 16:51:40,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 6581 transitions. [2021-06-05 16:51:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:40,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:40,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:40,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3199 [2021-06-05 16:51:40,443 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash 307287371, now seen corresponding path program 53 times [2021-06-05 16:51:40,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:40,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059390687] [2021-06-05 16:51:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:40,877 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 16:51:41,115 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 16:51:41,270 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-05 16:51:41,374 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 16:51:41,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:41,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059390687] [2021-06-05 16:51:41,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059390687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:41,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99766205] [2021-06-05 16:51:41,374 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 16:51:41,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:51:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:51:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:41,953 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:51:42,052 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_446], 3=[v_prenex_445, v_prenex_447], 6=[A]} [2021-06-05 16:51:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:42,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:42,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:51:42,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:42,081 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:51:42,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:51:42,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:42,423 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 16:51:42,424 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-06-05 16:51:42,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:42,442 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:51:42,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2021-06-05 16:51:42,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:42,459 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:51:42,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 49 [2021-06-05 16:51:42,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:42,753 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-05 16:51:42,753 INFO L628 ElimStorePlain]: treesize reduction 36, result has 91.4 percent of original size [2021-06-05 16:51:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:42,773 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:51:42,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:51:42,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:42,788 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:51:42,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-06-05 16:51:42,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:42,908 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:51:42,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:42,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:42,939 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 16:51:42,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 59 [2021-06-05 16:51:42,940 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:42,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:42,958 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:51:42,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-05 16:51:42,959 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:43,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:43,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:51:43,052 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:518, output treesize:190 [2021-06-05 16:51:43,258 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 16:51:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99766205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:43,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:43,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:51:43,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781473347] [2021-06-05 16:51:43,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:51:43,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:51:43,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:51:43,258 INFO L87 Difference]: Start difference. First operand 1943 states and 6581 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:43,667 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-05 16:51:44,192 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 16:51:44,400 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-05 16:51:44,950 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 16:51:45,296 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-06-05 16:51:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:45,373 INFO L93 Difference]: Finished difference Result 2604 states and 8626 transitions. [2021-06-05 16:51:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:51:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:45,377 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 16:51:45,377 INFO L226 Difference]: Without dead ends: 2579 [2021-06-05 16:51:45,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2930.5ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:51:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-06-05 16:51:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1939. [2021-06-05 16:51:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.392672858617131) internal successors, (6575), 1938 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6575 transitions. [2021-06-05 16:51:45,410 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6575 transitions. Word has length 26 [2021-06-05 16:51:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:45,410 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6575 transitions. [2021-06-05 16:51:45,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6575 transitions. [2021-06-05 16:51:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:45,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:45,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:45,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3213,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:45,617 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:45,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:45,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1089911327, now seen corresponding path program 61 times [2021-06-05 16:51:45,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:45,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822106669] [2021-06-05 16:51:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:45,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822106669] [2021-06-05 16:51:45,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822106669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563892474] [2021-06-05 16:51:45,980 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 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 16:51:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:46,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:46,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,512 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 1 [2021-06-05 16:51:46,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,548 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:51:46,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 63 [2021-06-05 16:51:46,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,567 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 62 [2021-06-05 16:51:46,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,597 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:51:46,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 16:51:46,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,617 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 1 [2021-06-05 16:51:46,618 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,636 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:51:46,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,656 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 1 [2021-06-05 16:51:46,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,689 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 1 [2021-06-05 16:51:46,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,708 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 1 [2021-06-05 16:51:46,709 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,736 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:51:46,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 74 [2021-06-05 16:51:46,738 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,756 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 1 [2021-06-05 16:51:46,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,774 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 1 [2021-06-05 16:51:46,775 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,792 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 16:51:46,792 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,819 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:51:46,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 69 [2021-06-05 16:51:46,820 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,837 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:51:46,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 16:51:46,837 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:46,843 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:51:46,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 54 [2021-06-05 16:51:46,844 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:46,889 INFO L628 ElimStorePlain]: treesize reduction 66, result has 38.3 percent of original size [2021-06-05 16:51:46,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:51:46,891 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:2101, output treesize:30 [2021-06-05 16:51:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563892474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:46,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:46,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:51:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138677762] [2021-06-05 16:51:46,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:51:46,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:51:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:46,926 INFO L87 Difference]: Start difference. First operand 1939 states and 6575 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:47,693 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 16:51:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:48,491 INFO L93 Difference]: Finished difference Result 2711 states and 8858 transitions. [2021-06-05 16:51:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:51:48,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:48,495 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 16:51:48,495 INFO L226 Difference]: Without dead ends: 2674 [2021-06-05 16:51:48,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1765.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:51:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-06-05 16:51:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1951. [2021-06-05 16:51:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 16:51:48,520 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 16:51:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:48,520 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 16:51:48,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 16:51:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:48,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:48,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:48,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:48,724 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -164417461, now seen corresponding path program 62 times [2021-06-05 16:51:48,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:48,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470149977] [2021-06-05 16:51:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:49,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:49,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470149977] [2021-06-05 16:51:49,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470149977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:49,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195589632] [2021-06-05 16:51:49,092 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 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 16:51:49,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:49,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:51:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:49,438 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 16:51:49,478 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_448, v_prenex_452], 6=[A, v_prenex_450]} [2021-06-05 16:51:49,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:49,496 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 16:51:49,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 41 [2021-06-05 16:51:49,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:49,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:49,507 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:51:49,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:51:49,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:49,649 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-05 16:51:49,650 INFO L628 ElimStorePlain]: treesize reduction 303, result has 45.9 percent of original size [2021-06-05 16:51:49,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:49,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:51:49,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:49,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:49,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:49,723 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:51:49,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 52 [2021-06-05 16:51:49,725 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:51:49,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:49,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:49,784 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:51:49,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 47 [2021-06-05 16:51:49,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:49,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:49,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:51:49,823 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:691, output treesize:55 [2021-06-05 16:51:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:49,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195589632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:49,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:49,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:51:49,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094801238] [2021-06-05 16:51:49,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:51:49,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:51:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:49,884 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:51,551 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:51:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:51,708 INFO L93 Difference]: Finished difference Result 2506 states and 8326 transitions. [2021-06-05 16:51:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:51:51,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:51,712 INFO L225 Difference]: With dead ends: 2506 [2021-06-05 16:51:51,712 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 16:51:51,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2046.0ms TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:51:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 16:51:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1951. [2021-06-05 16:51:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 16:51:51,735 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 16:51:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:51,735 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 16:51:51,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 16:51:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:51,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:51,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:51,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:51,938 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1406408139, now seen corresponding path program 63 times [2021-06-05 16:51:51,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:51,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395995380] [2021-06-05 16:51:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:52,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395995380] [2021-06-05 16:51:52,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395995380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969449852] [2021-06-05 16:51:52,261 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 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 16:51:52,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:51:52,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:52,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:51:52,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,612 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:51:52,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 16:51:52,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,643 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:51:52,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 36 [2021-06-05 16:51:52,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,675 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:51:52,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 47 [2021-06-05 16:51:52,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,704 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:51:52,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 16:51:52,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,723 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:51:52,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,755 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:51:52,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 16:51:52,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,777 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 16:51:52,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,806 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:51:52,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2021-06-05 16:51:52,807 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,834 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:51:52,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 35 [2021-06-05 16:51:52,835 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,855 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 16:51:52,855 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,874 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:51:52,875 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,895 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:51:52,896 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,914 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:51:52,915 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,933 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:51:52,934 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,953 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:51:52,954 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:52,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:51:52,966 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:51:52,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:51:52,966 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:53,113 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-06-05 16:51:53,113 INFO L628 ElimStorePlain]: treesize reduction 192, result has 43.0 percent of original size [2021-06-05 16:51:53,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:51:53,115 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1321, output treesize:145 [2021-06-05 16:51:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:53,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969449852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:53,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:53,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:51:53,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901358936] [2021-06-05 16:51:53,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:51:53,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:51:53,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:51:53,421 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:54,151 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 16:51:54,829 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 16:51:54,973 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-05 16:51:55,319 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-06-05 16:51:55,955 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 16:51:56,123 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-05 16:51:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:56,393 INFO L93 Difference]: Finished difference Result 2931 states and 9407 transitions. [2021-06-05 16:51:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:51:56,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:51:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:56,397 INFO L225 Difference]: With dead ends: 2931 [2021-06-05 16:51:56,397 INFO L226 Difference]: Without dead ends: 2858 [2021-06-05 16:51:56,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 3007.4ms TimeCoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:51:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-05 16:51:56,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2137. [2021-06-05 16:51:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.387172284644195) internal successors, (7235), 2136 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7235 transitions. [2021-06-05 16:51:56,435 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7235 transitions. Word has length 26 [2021-06-05 16:51:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:56,435 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7235 transitions. [2021-06-05 16:51:56,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7235 transitions. [2021-06-05 16:51:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:51:56,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:56,438 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:56,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:56,639 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:56,639 INFO L82 PathProgramCache]: Analyzing trace with hash -958901773, now seen corresponding path program 54 times [2021-06-05 16:51:56,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:56,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386369974] [2021-06-05 16:51:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:57,014 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:51:57,172 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 16:51:57,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386369974] [2021-06-05 16:51:57,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386369974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356089411] [2021-06-05 16:51:57,172 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 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 16:51:57,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:51:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:57,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:51:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:57,747 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 16:51:58,009 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:51:58,164 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_464, v_prenex_466, v_prenex_468], 3=[A, v_prenex_462, v_prenex_463, v_prenex_465, v_prenex_467]} [2021-06-05 16:51:58,191 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:51:58,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 16:51:58,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:58,379 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 16:51:58,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:58,406 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:51:58,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:51:58,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:58,616 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:51:58,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:58,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 16:51:58,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:58,882 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 16:51:58,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:58,905 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:51:58,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 16:51:58,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:59,085 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 16:51:59,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:59,111 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:51:59,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 64 [2021-06-05 16:51:59,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:59,293 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 16:51:59,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:59,317 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:51:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 16:51:59,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:59,489 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:51:59,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:59,514 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:51:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 71 [2021-06-05 16:51:59,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:59,684 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:51:59,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:59,707 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:51:59,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 57 [2021-06-05 16:51:59,709 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:51:59,865 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:51:59,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:51:59,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:51:59,880 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:606, output treesize:480 [2021-06-05 16:52:00,132 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-06-05 16:52:00,229 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 16:52:00,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356089411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:00,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:00,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:52:00,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802652363] [2021-06-05 16:52:00,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:00,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:00,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:00,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:00,230 INFO L87 Difference]: Start difference. First operand 2137 states and 7235 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:00,917 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 16:52:01,064 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 16:52:01,728 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 16:52:02,188 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2021-06-05 16:52:02,503 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:52:03,410 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 103 [2021-06-05 16:52:03,952 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 129 [2021-06-05 16:52:05,160 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 123 [2021-06-05 16:52:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:05,662 INFO L93 Difference]: Finished difference Result 2788 states and 9199 transitions. [2021-06-05 16:52:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:52:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:05,666 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 16:52:05,666 INFO L226 Difference]: Without dead ends: 2773 [2021-06-05 16:52:05,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5509.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:52:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-06-05 16:52:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2145. [2021-06-05 16:52:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.3857276119402986) internal successors, (7259), 2144 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 7259 transitions. [2021-06-05 16:52:05,692 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 7259 transitions. Word has length 26 [2021-06-05 16:52:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:05,692 INFO L482 AbstractCegarLoop]: Abstraction has 2145 states and 7259 transitions. [2021-06-05 16:52:05,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 7259 transitions. [2021-06-05 16:52:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:52:05,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:05,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:05,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3338,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:05,895 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1718532743, now seen corresponding path program 55 times [2021-06-05 16:52:05,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:05,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11044985] [2021-06-05 16:52:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:06,389 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 16:52:06,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:06,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11044985] [2021-06-05 16:52:06,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11044985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:06,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014210226] [2021-06-05 16:52:06,389 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 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 16:52:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:52:06,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:06,851 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:52:06,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:06,931 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:52:06,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:52:06,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:07,070 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:52:07,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:07,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:52:07,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:07,225 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:52:07,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:07,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:52:07,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:07,374 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:52:07,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:07,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:52:07,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:07,523 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:52:07,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:07,536 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:52:07,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:52:07,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:07,665 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 16:52:07,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:07,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:52:07,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:07,806 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:52:07,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:07,818 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:52:07,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:52:07,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:07,938 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:52:07,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:07,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:07,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:52:07,952 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:08,064 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:52:08,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:08,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:52:08,072 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 16:52:08,209 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 16:52:08,288 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 16:52:08,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014210226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:08,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:08,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:52:08,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855001698] [2021-06-05 16:52:08,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:08,289 INFO L87 Difference]: Start difference. First operand 2145 states and 7259 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:08,652 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 16:52:08,929 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-05 16:52:09,546 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 16:52:09,933 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-05 16:52:10,168 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 16:52:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:10,416 INFO L93 Difference]: Finished difference Result 2992 states and 9916 transitions. [2021-06-05 16:52:10,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:52:10,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:10,420 INFO L225 Difference]: With dead ends: 2992 [2021-06-05 16:52:10,420 INFO L226 Difference]: Without dead ends: 2977 [2021-06-05 16:52:10,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2486.9ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:52:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-05 16:52:10,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2139. [2021-06-05 16:52:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.3835360149672593) internal successors, (7234), 2138 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7234 transitions. [2021-06-05 16:52:10,448 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7234 transitions. Word has length 26 [2021-06-05 16:52:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:10,448 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 7234 transitions. [2021-06-05 16:52:10,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7234 transitions. [2021-06-05 16:52:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:52:10,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:10,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:10,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-06-05 16:52:10,651 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:10,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:10,651 INFO L82 PathProgramCache]: Analyzing trace with hash 28589839, now seen corresponding path program 56 times [2021-06-05 16:52:10,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:10,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311331049] [2021-06-05 16:52:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:11,063 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 16:52:11,237 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 16:52:11,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:11,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311331049] [2021-06-05 16:52:11,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311331049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:11,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574270453] [2021-06-05 16:52:11,237 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 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 16:52:11,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:11,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:52:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:11,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,486 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:52:11,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 16:52:11,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,504 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:52:11,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 16:52:11,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,520 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:52:11,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 16:52:11,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,532 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:52:11,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,550 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:52:11,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:52:11,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,567 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:52:11,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 16:52:11,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,578 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:52:11,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,596 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:52:11,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 16:52:11,598 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,609 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 16:52:11,610 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,621 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:52:11,622 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,632 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:52:11,633 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,643 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:52:11,644 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,654 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:52:11,655 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,665 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:52:11,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:52:11,666 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:11,686 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:52:11,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:52:11,687 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,692 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-06-05 16:52:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:52:11,693 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:11,807 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-06-05 16:52:11,808 INFO L628 ElimStorePlain]: treesize reduction 123, result has 39.4 percent of original size [2021-06-05 16:52:11,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:52:11,809 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1445, output treesize:80 [2021-06-05 16:52:11,943 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 16:52:11,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574270453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:11,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:11,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:52:11,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450251509] [2021-06-05 16:52:11,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:11,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:11,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:11,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:11,944 INFO L87 Difference]: Start difference. First operand 2139 states and 7234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:12,230 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 16:52:12,916 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 16:52:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:13,396 INFO L93 Difference]: Finished difference Result 2826 states and 9360 transitions. [2021-06-05 16:52:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:52:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:13,401 INFO L225 Difference]: With dead ends: 2826 [2021-06-05 16:52:13,401 INFO L226 Difference]: Without dead ends: 2801 [2021-06-05 16:52:13,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1842.5ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:52:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-05 16:52:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2126. [2021-06-05 16:52:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 16:52:13,428 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 16:52:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:13,428 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 16:52:13,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 16:52:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:52:13,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:13,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:13,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-06-05 16:52:13,632 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:13,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1781836725, now seen corresponding path program 57 times [2021-06-05 16:52:13,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:13,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676644666] [2021-06-05 16:52:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:14,080 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 16:52:14,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676644666] [2021-06-05 16:52:14,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676644666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434506577] [2021-06-05 16:52:14,080 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 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 16:52:14,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:52:14,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:52:14,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:14,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:14,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:52:14,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,536 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:52:14,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-06-05 16:52:14,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:14,887 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-05 16:52:14,887 INFO L628 ElimStorePlain]: treesize reduction 12, result has 97.7 percent of original size [2021-06-05 16:52:14,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,904 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:52:14,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 16:52:14,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:14,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:14,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-06-05 16:52:14,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:15,209 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-05 16:52:15,209 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.9 percent of original size [2021-06-05 16:52:15,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:15,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 56 [2021-06-05 16:52:15,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,236 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:52:15,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 1 [2021-06-05 16:52:15,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:15,342 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:52:15,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:15,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 16:52:15,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:15,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:15,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:15,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-06-05 16:52:15,372 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:15,633 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 16:52:15,634 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.5 percent of original size [2021-06-05 16:52:15,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:52:15,640 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:559, output treesize:189 [2021-06-05 16:52:15,828 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 16:52:15,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434506577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:15,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:15,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:52:15,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187512315] [2021-06-05 16:52:15,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:15,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:15,829 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:16,945 INFO L93 Difference]: Finished difference Result 2742 states and 9142 transitions. [2021-06-05 16:52:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:52:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:16,949 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 16:52:16,949 INFO L226 Difference]: Without dead ends: 2727 [2021-06-05 16:52:16,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1319.8ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:52:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-06-05 16:52:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2126. [2021-06-05 16:52:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 16:52:16,974 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 16:52:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:16,975 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 16:52:16,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 16:52:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:52:16,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:16,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:17,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:17,178 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:17,178 INFO L82 PathProgramCache]: Analyzing trace with hash -529489601, now seen corresponding path program 64 times [2021-06-05 16:52:17,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:17,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659155628] [2021-06-05 16:52:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:17,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:17,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659155628] [2021-06-05 16:52:17,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659155628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:17,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70792738] [2021-06-05 16:52:17,596 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 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 16:52:17,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:17,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:52:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,055 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:52:18,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,074 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 16:52:18,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,101 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:52:18,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 50 [2021-06-05 16:52:18,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,119 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 16:52:18,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,139 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:52:18,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,166 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:52:18,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 16:52:18,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,185 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 16:52:18,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,205 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 16:52:18,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,224 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 16:52:18,225 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,242 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 16:52:18,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,261 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 16:52:18,263 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,281 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 16:52:18,282 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,299 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 16:52:18,300 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,318 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 16:52:18,319 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,336 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:52:18,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:52:18,337 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:18,353 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:52:18,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 16:52:18,354 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:18,402 INFO L628 ElimStorePlain]: treesize reduction 74, result has 35.7 percent of original size [2021-06-05 16:52:18,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:52:18,403 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 16:52:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:18,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70792738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:18,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:18,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:52:18,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557200440] [2021-06-05 16:52:18,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:18,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:18,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:18,449 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:19,890 INFO L93 Difference]: Finished difference Result 2821 states and 9363 transitions. [2021-06-05 16:52:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:52:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:19,895 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 16:52:19,895 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 16:52:19,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1552.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:52:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 16:52:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2120. [2021-06-05 16:52:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.382255781028787) internal successors, (7167), 2119 states have internal predecessors, (7167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7167 transitions. [2021-06-05 16:52:19,935 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7167 transitions. Word has length 26 [2021-06-05 16:52:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:19,935 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7167 transitions. [2021-06-05 16:52:19,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7167 transitions. [2021-06-05 16:52:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:52:19,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:19,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:20,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:20,138 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash -815414513, now seen corresponding path program 65 times [2021-06-05 16:52:20,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:20,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602984982] [2021-06-05 16:52:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:20,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602984982] [2021-06-05 16:52:20,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602984982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029034646] [2021-06-05 16:52:20,513 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 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 16:52:20,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:52:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:52:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:20,859 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 16:52:20,913 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_493], 5=[v_prenex_491, v_prenex_495]} [2021-06-05 16:52:20,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:20,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:20,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:20,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:52:20,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:20,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:20,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:52:20,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:21,067 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 16:52:21,067 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 16:52:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:21,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:21,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 16:52:21,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:21,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:21,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:21,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:21,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 16:52:21,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:21,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:21,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:21,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:21,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:52:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 16:52:21,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:21,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:21,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:52:21,211 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 16:52:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:21,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029034646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:21,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:21,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:52:21,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497532914] [2021-06-05 16:52:21,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:21,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:21,259 INFO L87 Difference]: Start difference. First operand 2120 states and 7167 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:22,544 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 16:52:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:22,653 INFO L93 Difference]: Finished difference Result 2661 states and 8818 transitions. [2021-06-05 16:52:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:52:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:22,657 INFO L225 Difference]: With dead ends: 2661 [2021-06-05 16:52:22,657 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 16:52:22,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1566.5ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:52:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 16:52:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2120. [2021-06-05 16:52:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 16:52:22,682 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 16:52:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:22,682 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 16:52:22,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 16:52:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:52:22,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:22,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:22,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3459,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:22,885 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1107808399, now seen corresponding path program 66 times [2021-06-05 16:52:22,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:22,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389072354] [2021-06-05 16:52:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:23,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:23,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389072354] [2021-06-05 16:52:23,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389072354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:23,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122168550] [2021-06-05 16:52:23,208 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 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 16:52:23,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:52:23,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:52:23,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,495 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 16:52:23,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-06-05 16:52:23,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,531 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:52:23,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 16:52:23,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,576 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:52:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 40 [2021-06-05 16:52:23,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,605 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:52:23,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 42 [2021-06-05 16:52:23,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,624 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:52:23,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,644 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:52:23,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,681 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 16:52:23,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 55 [2021-06-05 16:52:23,684 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,701 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:52:23,703 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,730 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 16:52:23,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 40 [2021-06-05 16:52:23,732 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,760 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:52:23,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 42 [2021-06-05 16:52:23,761 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,778 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:52:23,780 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:23,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 71 [2021-06-05 16:52:23,817 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,836 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 16:52:23,837 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,855 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 1 [2021-06-05 16:52:23,856 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,875 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:52:23,875 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:52:23,887 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:52:23,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:52:23,888 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:23,988 INFO L628 ElimStorePlain]: treesize reduction 270, result has 20.6 percent of original size [2021-06-05 16:52:23,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:52:23,989 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1081, output treesize:70 [2021-06-05 16:52:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:24,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122168550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:24,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:24,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:52:24,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556459806] [2021-06-05 16:52:24,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:24,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:24,101 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:24,726 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 16:52:25,568 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 16:52:25,727 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 16:52:26,058 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 16:52:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:26,334 INFO L93 Difference]: Finished difference Result 2604 states and 8571 transitions. [2021-06-05 16:52:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:52:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:26,337 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 16:52:26,337 INFO L226 Difference]: Without dead ends: 2574 [2021-06-05 16:52:26,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2294.0ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:52:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-05 16:52:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2120. [2021-06-05 16:52:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 16:52:26,365 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 16:52:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:26,365 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 16:52:26,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 16:52:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:26,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:26,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:26,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-06-05 16:52:26,569 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1424792101, now seen corresponding path program 58 times [2021-06-05 16:52:26,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:26,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061057765] [2021-06-05 16:52:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:26,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061057765] [2021-06-05 16:52:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061057765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927622103] [2021-06-05 16:52:26,610 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 16:52:26,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:26,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927622103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:26,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:26,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:52:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359069746] [2021-06-05 16:52:26,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:26,733 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:27,664 INFO L93 Difference]: Finished difference Result 5051 states and 15656 transitions. [2021-06-05 16:52:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:52:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:27,670 INFO L225 Difference]: With dead ends: 5051 [2021-06-05 16:52:27,670 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 16:52:27,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:52:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 16:52:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 2317. [2021-06-05 16:52:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.435233160621762) internal successors, (7956), 2316 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7956 transitions. [2021-06-05 16:52:27,713 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7956 transitions. Word has length 28 [2021-06-05 16:52:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:27,713 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7956 transitions. [2021-06-05 16:52:27,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7956 transitions. [2021-06-05 16:52:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:27,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:27,717 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:27,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3503,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:27,932 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash 448473257, now seen corresponding path program 59 times [2021-06-05 16:52:27,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:27,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400614928] [2021-06-05 16:52:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:27,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:27,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400614928] [2021-06-05 16:52:27,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400614928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:27,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535089168] [2021-06-05 16:52:27,975 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 16:52:28,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:52:28,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:28,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:28,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535089168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:28,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:28,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:52:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218994496] [2021-06-05 16:52:28,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:52:28,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:52:28,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:52:28,108 INFO L87 Difference]: Start difference. First operand 2317 states and 7956 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:29,336 INFO L93 Difference]: Finished difference Result 6617 states and 20175 transitions. [2021-06-05 16:52:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:52:29,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:29,344 INFO L225 Difference]: With dead ends: 6617 [2021-06-05 16:52:29,344 INFO L226 Difference]: Without dead ends: 6617 [2021-06-05 16:52:29,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 747.6ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:52:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-05 16:52:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2331. [2021-06-05 16:52:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.4437768240343347) internal successors, (8024), 2330 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 8024 transitions. [2021-06-05 16:52:29,415 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 8024 transitions. Word has length 28 [2021-06-05 16:52:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:29,415 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 8024 transitions. [2021-06-05 16:52:29,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 8024 transitions. [2021-06-05 16:52:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:29,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:29,418 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:29,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3504 [2021-06-05 16:52:29,621 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1977377901, now seen corresponding path program 60 times [2021-06-05 16:52:29,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:29,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004518879] [2021-06-05 16:52:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:29,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:29,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004518879] [2021-06-05 16:52:29,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004518879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:29,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573044924] [2021-06-05 16:52:29,666 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 16:52:29,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:52:29,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:29,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:29,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573044924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:29,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:29,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:52:29,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542352999] [2021-06-05 16:52:29,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:52:29,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:29,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:52:29,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:52:29,803 INFO L87 Difference]: Start difference. First operand 2331 states and 8024 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:31,022 INFO L93 Difference]: Finished difference Result 6008 states and 18701 transitions. [2021-06-05 16:52:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:52:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:31,030 INFO L225 Difference]: With dead ends: 6008 [2021-06-05 16:52:31,030 INFO L226 Difference]: Without dead ends: 6008 [2021-06-05 16:52:31,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 726.4ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:52:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2021-06-05 16:52:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 2276. [2021-06-05 16:52:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.418901098901099) internal successors, (7778), 2275 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 7778 transitions. [2021-06-05 16:52:31,075 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 7778 transitions. Word has length 28 [2021-06-05 16:52:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:31,075 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 7778 transitions. [2021-06-05 16:52:31,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 7778 transitions. [2021-06-05 16:52:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:31,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:31,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:31,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3505,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:31,281 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1153995099, now seen corresponding path program 61 times [2021-06-05 16:52:31,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:31,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689199215] [2021-06-05 16:52:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689199215] [2021-06-05 16:52:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689199215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730662067] [2021-06-05 16:52:31,339 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 16:52:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:31,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:31,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730662067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:31,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:31,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:52:31,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533529359] [2021-06-05 16:52:31,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:31,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:31,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:31,470 INFO L87 Difference]: Start difference. First operand 2276 states and 7778 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:32,510 INFO L93 Difference]: Finished difference Result 5144 states and 15840 transitions. [2021-06-05 16:52:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:52:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:32,517 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 16:52:32,517 INFO L226 Difference]: Without dead ends: 5144 [2021-06-05 16:52:32,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:52:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-06-05 16:52:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 2286. [2021-06-05 16:52:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 3.415317286652079) internal successors, (7804), 2285 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7804 transitions. [2021-06-05 16:52:32,555 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7804 transitions. Word has length 28 [2021-06-05 16:52:32,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:32,556 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 7804 transitions. [2021-06-05 16:52:32,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7804 transitions. [2021-06-05 16:52:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:32,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:32,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:32,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-06-05 16:52:32,759 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash 987823393, now seen corresponding path program 67 times [2021-06-05 16:52:32,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:32,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007616947] [2021-06-05 16:52:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:32,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:32,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007616947] [2021-06-05 16:52:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007616947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:32,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910125112] [2021-06-05 16:52:32,802 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 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 16:52:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:32,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:32,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910125112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:32,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:32,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:52:32,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542241938] [2021-06-05 16:52:32,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:32,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:32,927 INFO L87 Difference]: Start difference. First operand 2286 states and 7804 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:33,543 INFO L93 Difference]: Finished difference Result 4580 states and 14284 transitions. [2021-06-05 16:52:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:52:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:33,550 INFO L225 Difference]: With dead ends: 4580 [2021-06-05 16:52:33,550 INFO L226 Difference]: Without dead ends: 4580 [2021-06-05 16:52:33,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:52:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2021-06-05 16:52:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 2356. [2021-06-05 16:52:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.4) internal successors, (8007), 2355 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8007 transitions. [2021-06-05 16:52:33,591 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8007 transitions. Word has length 28 [2021-06-05 16:52:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:33,591 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8007 transitions. [2021-06-05 16:52:33,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8007 transitions. [2021-06-05 16:52:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:33,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:33,594 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:33,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3507 [2021-06-05 16:52:33,796 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 846454761, now seen corresponding path program 62 times [2021-06-05 16:52:33,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:33,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056624473] [2021-06-05 16:52:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:33,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:33,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056624473] [2021-06-05 16:52:33,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056624473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:33,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630561333] [2021-06-05 16:52:33,824 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 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 16:52:33,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:33,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:33,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:52:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:33,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630561333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:33,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:33,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:52:33,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231766402] [2021-06-05 16:52:33,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:52:33,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:33,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:52:33,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:52:33,908 INFO L87 Difference]: Start difference. First operand 2356 states and 8007 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:34,086 INFO L93 Difference]: Finished difference Result 3884 states and 12614 transitions. [2021-06-05 16:52:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:52:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:34,092 INFO L225 Difference]: With dead ends: 3884 [2021-06-05 16:52:34,092 INFO L226 Difference]: Without dead ends: 3866 [2021-06-05 16:52:34,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:52:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-05 16:52:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 2736. [2021-06-05 16:52:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 3.4661791590493602) internal successors, (9480), 2735 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 9480 transitions. [2021-06-05 16:52:34,133 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 9480 transitions. Word has length 28 [2021-06-05 16:52:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:34,133 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 9480 transitions. [2021-06-05 16:52:34,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 9480 transitions. [2021-06-05 16:52:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:34,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:34,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:34,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3508 [2021-06-05 16:52:34,337 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:34,337 INFO L82 PathProgramCache]: Analyzing trace with hash 409486053, now seen corresponding path program 63 times [2021-06-05 16:52:34,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:34,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740934745] [2021-06-05 16:52:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:34,371 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 16:52:34,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740934745] [2021-06-05 16:52:34,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740934745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:34,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627292828] [2021-06-05 16:52:34,372 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 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 16:52:34,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:52:34,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:34,479 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 16:52:34,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627292828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:34,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:34,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:52:34,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131640158] [2021-06-05 16:52:34,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:34,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:34,480 INFO L87 Difference]: Start difference. First operand 2736 states and 9480 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:35,111 INFO L93 Difference]: Finished difference Result 4561 states and 14499 transitions. [2021-06-05 16:52:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:52:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:35,118 INFO L225 Difference]: With dead ends: 4561 [2021-06-05 16:52:35,118 INFO L226 Difference]: Without dead ends: 4514 [2021-06-05 16:52:35,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:52:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-06-05 16:52:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 2898. [2021-06-05 16:52:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.486365205384881) internal successors, (10100), 2897 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10100 transitions. [2021-06-05 16:52:35,167 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10100 transitions. Word has length 28 [2021-06-05 16:52:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:35,167 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 10100 transitions. [2021-06-05 16:52:35,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10100 transitions. [2021-06-05 16:52:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:35,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:35,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:35,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3509,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:35,371 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1945575529, now seen corresponding path program 64 times [2021-06-05 16:52:35,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:35,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046412301] [2021-06-05 16:52:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:35,413 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 16:52:35,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:35,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046412301] [2021-06-05 16:52:35,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046412301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:35,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726103065] [2021-06-05 16:52:35,413 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 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 16:52:35,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:35,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:35,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:35,548 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 16:52:35,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726103065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:35,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:35,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:52:35,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412775231] [2021-06-05 16:52:35,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:35,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:35,549 INFO L87 Difference]: Start difference. First operand 2898 states and 10100 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:36,307 INFO L93 Difference]: Finished difference Result 4846 states and 15131 transitions. [2021-06-05 16:52:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:52:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:36,315 INFO L225 Difference]: With dead ends: 4846 [2021-06-05 16:52:36,315 INFO L226 Difference]: Without dead ends: 4820 [2021-06-05 16:52:36,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:52:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-06-05 16:52:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 2913. [2021-06-05 16:52:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4903846153846154) internal successors, (10164), 2912 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10164 transitions. [2021-06-05 16:52:36,372 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10164 transitions. Word has length 28 [2021-06-05 16:52:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:36,372 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10164 transitions. [2021-06-05 16:52:36,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10164 transitions. [2021-06-05 16:52:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:36,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:36,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:36,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3510,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:36,577 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1676978985, now seen corresponding path program 65 times [2021-06-05 16:52:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:36,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028189580] [2021-06-05 16:52:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:36,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:36,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028189580] [2021-06-05 16:52:36,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028189580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:36,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654221478] [2021-06-05 16:52:36,627 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 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 16:52:36,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:52:36,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:36,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654221478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:36,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:36,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:52:36,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717572474] [2021-06-05 16:52:36,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:36,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:36,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:36,751 INFO L87 Difference]: Start difference. First operand 2913 states and 10164 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:37,499 INFO L93 Difference]: Finished difference Result 4838 states and 15131 transitions. [2021-06-05 16:52:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:52:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:37,507 INFO L225 Difference]: With dead ends: 4838 [2021-06-05 16:52:37,507 INFO L226 Difference]: Without dead ends: 4823 [2021-06-05 16:52:37,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:52:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-06-05 16:52:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 2913. [2021-06-05 16:52:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.48592032967033) internal successors, (10151), 2912 states have internal predecessors, (10151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10151 transitions. [2021-06-05 16:52:37,561 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10151 transitions. Word has length 28 [2021-06-05 16:52:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:37,561 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10151 transitions. [2021-06-05 16:52:37,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10151 transitions. [2021-06-05 16:52:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:37,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:37,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:37,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3511 [2021-06-05 16:52:37,765 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1569189389, now seen corresponding path program 66 times [2021-06-05 16:52:37,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:37,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679703767] [2021-06-05 16:52:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:37,799 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 16:52:37,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679703767] [2021-06-05 16:52:37,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679703767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261086170] [2021-06-05 16:52:37,799 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 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 16:52:37,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:52:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:37,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:37,895 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 16:52:37,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261086170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:37,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:37,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:52:37,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155395047] [2021-06-05 16:52:37,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:52:37,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:37,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:52:37,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:52:37,896 INFO L87 Difference]: Start difference. First operand 2913 states and 10151 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:38,453 INFO L93 Difference]: Finished difference Result 5599 states and 17892 transitions. [2021-06-05 16:52:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:52:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:38,460 INFO L225 Difference]: With dead ends: 5599 [2021-06-05 16:52:38,460 INFO L226 Difference]: Without dead ends: 5552 [2021-06-05 16:52:38,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:52:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-06-05 16:52:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 3063. [2021-06-05 16:52:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 3.5303723056825604) internal successors, (10810), 3062 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 10810 transitions. [2021-06-05 16:52:38,510 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 10810 transitions. Word has length 28 [2021-06-05 16:52:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:38,510 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 10810 transitions. [2021-06-05 16:52:38,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 10810 transitions. [2021-06-05 16:52:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:38,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:38,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:38,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3512,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:38,714 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:38,714 INFO L82 PathProgramCache]: Analyzing trace with hash -641999155, now seen corresponding path program 67 times [2021-06-05 16:52:38,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:38,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674869713] [2021-06-05 16:52:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:38,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:38,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674869713] [2021-06-05 16:52:38,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674869713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:38,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076122503] [2021-06-05 16:52:38,738 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 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 16:52:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:38,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:52:38,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:38,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076122503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:38,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:38,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:52:38,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833908670] [2021-06-05 16:52:38,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:52:38,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:52:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:52:38,825 INFO L87 Difference]: Start difference. First operand 3063 states and 10810 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:39,000 INFO L93 Difference]: Finished difference Result 4390 states and 14427 transitions. [2021-06-05 16:52:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:52:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:39,007 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 16:52:39,007 INFO L226 Difference]: Without dead ends: 4390 [2021-06-05 16:52:39,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-06-05 16:52:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 2947. [2021-06-05 16:52:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2946 states have (on average 3.5020366598778003) internal successors, (10317), 2946 states have internal predecessors, (10317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 10317 transitions. [2021-06-05 16:52:39,050 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 10317 transitions. Word has length 28 [2021-06-05 16:52:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:39,051 INFO L482 AbstractCegarLoop]: Abstraction has 2947 states and 10317 transitions. [2021-06-05 16:52:39,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 10317 transitions. [2021-06-05 16:52:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:39,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:39,054 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:39,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3513,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:39,255 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1988680721, now seen corresponding path program 68 times [2021-06-05 16:52:39,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:39,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786283020] [2021-06-05 16:52:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:39,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:39,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786283020] [2021-06-05 16:52:39,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786283020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:39,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208820555] [2021-06-05 16:52:39,297 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 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 16:52:39,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:39,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208820555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:39,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:39,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:52:39,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385830195] [2021-06-05 16:52:39,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:52:39,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:52:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:52:39,407 INFO L87 Difference]: Start difference. First operand 2947 states and 10317 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:40,137 INFO L93 Difference]: Finished difference Result 6294 states and 19912 transitions. [2021-06-05 16:52:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:52:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:40,148 INFO L225 Difference]: With dead ends: 6294 [2021-06-05 16:52:40,148 INFO L226 Difference]: Without dead ends: 6294 [2021-06-05 16:52:40,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:52:40,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-06-05 16:52:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 2965. [2021-06-05 16:52:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.5020242914979756) internal successors, (10380), 2964 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 10380 transitions. [2021-06-05 16:52:40,213 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 10380 transitions. Word has length 28 [2021-06-05 16:52:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:40,214 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 10380 transitions. [2021-06-05 16:52:40,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 10380 transitions. [2021-06-05 16:52:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:40,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:40,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:40,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3514 [2021-06-05 16:52:40,418 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:40,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1203766627, now seen corresponding path program 69 times [2021-06-05 16:52:40,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:40,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561065823] [2021-06-05 16:52:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:40,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561065823] [2021-06-05 16:52:40,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561065823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259183400] [2021-06-05 16:52:40,453 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 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 16:52:40,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:52:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:40,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259183400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:40,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:40,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:52:40,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025971932] [2021-06-05 16:52:40,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:52:40,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:52:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:52:40,563 INFO L87 Difference]: Start difference. First operand 2965 states and 10380 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:41,345 INFO L93 Difference]: Finished difference Result 6549 states and 20685 transitions. [2021-06-05 16:52:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:52:41,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:41,354 INFO L225 Difference]: With dead ends: 6549 [2021-06-05 16:52:41,354 INFO L226 Difference]: Without dead ends: 6549 [2021-06-05 16:52:41,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:52:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2021-06-05 16:52:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 3059. [2021-06-05 16:52:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.4947678221059517) internal successors, (10687), 3058 states have internal predecessors, (10687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 10687 transitions. [2021-06-05 16:52:41,421 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 10687 transitions. Word has length 28 [2021-06-05 16:52:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:41,421 INFO L482 AbstractCegarLoop]: Abstraction has 3059 states and 10687 transitions. [2021-06-05 16:52:41,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 10687 transitions. [2021-06-05 16:52:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:41,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:41,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:41,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3515,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:41,625 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2008178013, now seen corresponding path program 70 times [2021-06-05 16:52:41,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:41,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725387423] [2021-06-05 16:52:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:41,658 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 16:52:41,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:41,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725387423] [2021-06-05 16:52:41,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725387423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:41,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966076090] [2021-06-05 16:52:41,659 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 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 16:52:41,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:41,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:41,752 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 16:52:41,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966076090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:41,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:41,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:52:41,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677240694] [2021-06-05 16:52:41,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:52:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:52:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:52:41,752 INFO L87 Difference]: Start difference. First operand 3059 states and 10687 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:42,367 INFO L93 Difference]: Finished difference Result 6709 states and 21196 transitions. [2021-06-05 16:52:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:52:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:42,377 INFO L225 Difference]: With dead ends: 6709 [2021-06-05 16:52:42,377 INFO L226 Difference]: Without dead ends: 6673 [2021-06-05 16:52:42,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:52:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2021-06-05 16:52:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 3461. [2021-06-05 16:52:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 3.5245664739884393) internal successors, (12195), 3460 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 12195 transitions. [2021-06-05 16:52:42,461 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 12195 transitions. Word has length 28 [2021-06-05 16:52:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:42,461 INFO L482 AbstractCegarLoop]: Abstraction has 3461 states and 12195 transitions. [2021-06-05 16:52:42,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 12195 transitions. [2021-06-05 16:52:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:42,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:42,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:42,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3516 [2021-06-05 16:52:42,665 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:42,665 INFO L82 PathProgramCache]: Analyzing trace with hash -815711165, now seen corresponding path program 71 times [2021-06-05 16:52:42,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:42,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049602510] [2021-06-05 16:52:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:42,698 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 16:52:42,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049602510] [2021-06-05 16:52:42,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049602510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338310037] [2021-06-05 16:52:42,698 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 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 16:52:42,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:52:42,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:42,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:42,797 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 16:52:42,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338310037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:42,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:42,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:52:42,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574301812] [2021-06-05 16:52:42,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:52:42,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:52:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:52:42,798 INFO L87 Difference]: Start difference. First operand 3461 states and 12195 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:43,396 INFO L93 Difference]: Finished difference Result 6846 states and 21557 transitions. [2021-06-05 16:52:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:52:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:43,406 INFO L225 Difference]: With dead ends: 6846 [2021-06-05 16:52:43,406 INFO L226 Difference]: Without dead ends: 6846 [2021-06-05 16:52:43,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:52:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-06-05 16:52:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3175. [2021-06-05 16:52:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.484247006931317) internal successors, (11059), 3174 states have internal predecessors, (11059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11059 transitions. [2021-06-05 16:52:43,481 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11059 transitions. Word has length 28 [2021-06-05 16:52:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:43,481 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11059 transitions. [2021-06-05 16:52:43,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11059 transitions. [2021-06-05 16:52:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:43,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:43,486 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:43,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3517 [2021-06-05 16:52:43,686 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash -257646883, now seen corresponding path program 72 times [2021-06-05 16:52:43,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:43,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930746728] [2021-06-05 16:52:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:43,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:43,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930746728] [2021-06-05 16:52:43,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930746728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:43,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525534948] [2021-06-05 16:52:43,722 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 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 16:52:43,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:52:43,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:43,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:43,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525534948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:43,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:43,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:52:43,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480786293] [2021-06-05 16:52:43,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:52:43,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:52:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:52:43,819 INFO L87 Difference]: Start difference. First operand 3175 states and 11059 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:44,545 INFO L93 Difference]: Finished difference Result 6061 states and 19490 transitions. [2021-06-05 16:52:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:52:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:44,554 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 16:52:44,554 INFO L226 Difference]: Without dead ends: 6057 [2021-06-05 16:52:44,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:52:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2021-06-05 16:52:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 2935. [2021-06-05 16:52:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.507498295841854) internal successors, (10291), 2934 states have internal predecessors, (10291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 10291 transitions. [2021-06-05 16:52:44,609 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 10291 transitions. Word has length 28 [2021-06-05 16:52:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:44,609 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 10291 transitions. [2021-06-05 16:52:44,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 10291 transitions. [2021-06-05 16:52:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:44,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:44,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:44,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3518 [2021-06-05 16:52:44,813 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1520596959, now seen corresponding path program 73 times [2021-06-05 16:52:44,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:44,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341688787] [2021-06-05 16:52:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:44,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341688787] [2021-06-05 16:52:44,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341688787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021654125] [2021-06-05 16:52:44,868 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 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 16:52:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:44,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021654125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:44,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:44,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:52:44,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564250693] [2021-06-05 16:52:44,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:44,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:44,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:44,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:44,999 INFO L87 Difference]: Start difference. First operand 2935 states and 10291 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:46,061 INFO L93 Difference]: Finished difference Result 9324 states and 30354 transitions. [2021-06-05 16:52:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:52:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:46,075 INFO L225 Difference]: With dead ends: 9324 [2021-06-05 16:52:46,075 INFO L226 Difference]: Without dead ends: 9324 [2021-06-05 16:52:46,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:52:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2021-06-05 16:52:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 3117. [2021-06-05 16:52:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.5805519897304237) internal successors, (11157), 3116 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 11157 transitions. [2021-06-05 16:52:46,148 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 11157 transitions. Word has length 28 [2021-06-05 16:52:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:46,148 INFO L482 AbstractCegarLoop]: Abstraction has 3117 states and 11157 transitions. [2021-06-05 16:52:46,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 11157 transitions. [2021-06-05 16:52:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:46,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:46,152 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:46,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3519,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:46,352 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash 8307685, now seen corresponding path program 74 times [2021-06-05 16:52:46,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:46,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997225575] [2021-06-05 16:52:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:46,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:46,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997225575] [2021-06-05 16:52:46,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997225575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:46,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625967836] [2021-06-05 16:52:46,387 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 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 16:52:46,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:46,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:46,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625967836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:46,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:46,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:52:46,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049062062] [2021-06-05 16:52:46,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:46,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:46,508 INFO L87 Difference]: Start difference. First operand 3117 states and 11157 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:47,503 INFO L93 Difference]: Finished difference Result 9147 states and 29872 transitions. [2021-06-05 16:52:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:52:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:47,519 INFO L225 Difference]: With dead ends: 9147 [2021-06-05 16:52:47,519 INFO L226 Difference]: Without dead ends: 9147 [2021-06-05 16:52:47,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 601.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:52:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-06-05 16:52:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 3083. [2021-06-05 16:52:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 3.562621674237508) internal successors, (10980), 3082 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 10980 transitions. [2021-06-05 16:52:47,634 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 10980 transitions. Word has length 28 [2021-06-05 16:52:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:47,635 INFO L482 AbstractCegarLoop]: Abstraction has 3083 states and 10980 transitions. [2021-06-05 16:52:47,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 10980 transitions. [2021-06-05 16:52:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:47,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:47,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:47,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:47,839 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2125990737, now seen corresponding path program 75 times [2021-06-05 16:52:47,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:47,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090358319] [2021-06-05 16:52:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:47,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:47,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090358319] [2021-06-05 16:52:47,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090358319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:47,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534530808] [2021-06-05 16:52:47,883 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 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 16:52:47,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:52:47,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:47,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534530808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:47,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:47,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:52:47,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861898959] [2021-06-05 16:52:47,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:47,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:47,995 INFO L87 Difference]: Start difference. First operand 3083 states and 10980 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:48,926 INFO L93 Difference]: Finished difference Result 8583 states and 27105 transitions. [2021-06-05 16:52:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:52:48,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:48,939 INFO L225 Difference]: With dead ends: 8583 [2021-06-05 16:52:48,939 INFO L226 Difference]: Without dead ends: 8583 [2021-06-05 16:52:48,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:52:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-06-05 16:52:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 3103. [2021-06-05 16:52:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.5660863958736297) internal successors, (11062), 3102 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 11062 transitions. [2021-06-05 16:52:49,018 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 11062 transitions. Word has length 28 [2021-06-05 16:52:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:49,018 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 11062 transitions. [2021-06-05 16:52:49,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 11062 transitions. [2021-06-05 16:52:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:49,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:49,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:49,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:49,222 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1053673763, now seen corresponding path program 76 times [2021-06-05 16:52:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:49,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121154719] [2021-06-05 16:52:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:49,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:49,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121154719] [2021-06-05 16:52:49,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121154719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:49,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337231393] [2021-06-05 16:52:49,259 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 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 16:52:49,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:49,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:49,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337231393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:49,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:49,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:52:49,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564885921] [2021-06-05 16:52:49,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:49,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:49,394 INFO L87 Difference]: Start difference. First operand 3103 states and 11062 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:50,301 INFO L93 Difference]: Finished difference Result 8084 states and 25895 transitions. [2021-06-05 16:52:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:52:50,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:50,314 INFO L225 Difference]: With dead ends: 8084 [2021-06-05 16:52:50,314 INFO L226 Difference]: Without dead ends: 8076 [2021-06-05 16:52:50,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:52:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-05 16:52:50,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 3085. [2021-06-05 16:52:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.5619325551232164) internal successors, (10985), 3084 states have internal predecessors, (10985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 10985 transitions. [2021-06-05 16:52:50,389 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 10985 transitions. Word has length 28 [2021-06-05 16:52:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:50,389 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 10985 transitions. [2021-06-05 16:52:50,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 10985 transitions. [2021-06-05 16:52:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:50,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:50,393 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:50,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:50,597 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1235475809, now seen corresponding path program 77 times [2021-06-05 16:52:50,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:50,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770736117] [2021-06-05 16:52:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:50,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:50,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770736117] [2021-06-05 16:52:50,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770736117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:50,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790000175] [2021-06-05 16:52:50,636 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 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 16:52:50,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:52:50,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:50,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:50,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790000175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:50,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:50,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:52:50,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112038550] [2021-06-05 16:52:50,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:50,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:50,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:50,755 INFO L87 Difference]: Start difference. First operand 3085 states and 10985 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:51,747 INFO L93 Difference]: Finished difference Result 8010 states and 25668 transitions. [2021-06-05 16:52:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:52:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:51,760 INFO L225 Difference]: With dead ends: 8010 [2021-06-05 16:52:51,760 INFO L226 Difference]: Without dead ends: 8010 [2021-06-05 16:52:51,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 537.2ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:52:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-06-05 16:52:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 3101. [2021-06-05 16:52:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.5641935483870966) internal successors, (11049), 3100 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 11049 transitions. [2021-06-05 16:52:51,838 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 11049 transitions. Word has length 28 [2021-06-05 16:52:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:51,838 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 11049 transitions. [2021-06-05 16:52:51,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 11049 transitions. [2021-06-05 16:52:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:51,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:51,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:52,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3523 [2021-06-05 16:52:52,043 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:52,043 INFO L82 PathProgramCache]: Analyzing trace with hash 180098415, now seen corresponding path program 78 times [2021-06-05 16:52:52,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:52,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755041817] [2021-06-05 16:52:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:52,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:52,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755041817] [2021-06-05 16:52:52,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755041817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:52,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291488987] [2021-06-05 16:52:52,078 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 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 16:52:52,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:52:52,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:52,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291488987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:52,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:52,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:52:52,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282794816] [2021-06-05 16:52:52,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:52,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:52,192 INFO L87 Difference]: Start difference. First operand 3101 states and 11049 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:53,157 INFO L93 Difference]: Finished difference Result 7678 states and 24884 transitions. [2021-06-05 16:52:53,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:52:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:53,169 INFO L225 Difference]: With dead ends: 7678 [2021-06-05 16:52:53,169 INFO L226 Difference]: Without dead ends: 7670 [2021-06-05 16:52:53,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:52:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2021-06-05 16:52:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 2858. [2021-06-05 16:52:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 3.4816240812040604) internal successors, (9947), 2857 states have internal predecessors, (9947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 9947 transitions. [2021-06-05 16:52:53,238 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 9947 transitions. Word has length 28 [2021-06-05 16:52:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:53,238 INFO L482 AbstractCegarLoop]: Abstraction has 2858 states and 9947 transitions. [2021-06-05 16:52:53,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 9947 transitions. [2021-06-05 16:52:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:53,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:53,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:53,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3524,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:53,442 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1618231897, now seen corresponding path program 79 times [2021-06-05 16:52:53,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:53,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822471477] [2021-06-05 16:52:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:53,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:53,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822471477] [2021-06-05 16:52:53,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822471477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:53,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672848250] [2021-06-05 16:52:53,479 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 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 16:52:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:53,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:53,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672848250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:53,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:53,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:52:53,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775649271] [2021-06-05 16:52:53,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:53,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:53,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:53,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:53,619 INFO L87 Difference]: Start difference. First operand 2858 states and 9947 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:54,475 INFO L93 Difference]: Finished difference Result 5875 states and 18762 transitions. [2021-06-05 16:52:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:52:54,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:54,483 INFO L225 Difference]: With dead ends: 5875 [2021-06-05 16:52:54,483 INFO L226 Difference]: Without dead ends: 5875 [2021-06-05 16:52:54,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:52:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2021-06-05 16:52:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 2870. [2021-06-05 16:52:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.480306727082607) internal successors, (9985), 2869 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 9985 transitions. [2021-06-05 16:52:54,535 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 9985 transitions. Word has length 28 [2021-06-05 16:52:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:54,535 INFO L482 AbstractCegarLoop]: Abstraction has 2870 states and 9985 transitions. [2021-06-05 16:52:54,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 9985 transitions. [2021-06-05 16:52:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:54,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:54,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:54,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3525,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:54,738 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1792117207, now seen corresponding path program 80 times [2021-06-05 16:52:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:54,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602151550] [2021-06-05 16:52:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:54,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602151550] [2021-06-05 16:52:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602151550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600012315] [2021-06-05 16:52:54,775 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 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 16:52:54,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:54,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:54,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600012315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:54,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:54,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965108187] [2021-06-05 16:52:54,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:54,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:54,909 INFO L87 Difference]: Start difference. First operand 2870 states and 9985 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:56,029 INFO L93 Difference]: Finished difference Result 6654 states and 20757 transitions. [2021-06-05 16:52:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:52:56,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:56,039 INFO L225 Difference]: With dead ends: 6654 [2021-06-05 16:52:56,039 INFO L226 Difference]: Without dead ends: 6654 [2021-06-05 16:52:56,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:52:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-06-05 16:52:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2936. [2021-06-05 16:52:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 3.475979557069847) internal successors, (10202), 2935 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 10202 transitions. [2021-06-05 16:52:56,103 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 10202 transitions. Word has length 28 [2021-06-05 16:52:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:56,103 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 10202 transitions. [2021-06-05 16:52:56,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 10202 transitions. [2021-06-05 16:52:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:56,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:56,106 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:56,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:56,307 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1447472695, now seen corresponding path program 81 times [2021-06-05 16:52:56,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:56,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131988289] [2021-06-05 16:52:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:56,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:56,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131988289] [2021-06-05 16:52:56,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131988289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:56,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465369869] [2021-06-05 16:52:56,343 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 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 16:52:56,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:52:56,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:56,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465369869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:56,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:56,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:56,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61360094] [2021-06-05 16:52:56,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:56,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:56,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:56,475 INFO L87 Difference]: Start difference. First operand 2936 states and 10202 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:57,506 INFO L93 Difference]: Finished difference Result 6217 states and 19611 transitions. [2021-06-05 16:52:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:52:57,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:57,518 INFO L225 Difference]: With dead ends: 6217 [2021-06-05 16:52:57,519 INFO L226 Difference]: Without dead ends: 6213 [2021-06-05 16:52:57,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:52:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-06-05 16:52:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2862. [2021-06-05 16:52:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.471513456833275) internal successors, (9932), 2861 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9932 transitions. [2021-06-05 16:52:57,583 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9932 transitions. Word has length 28 [2021-06-05 16:52:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:57,583 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9932 transitions. [2021-06-05 16:52:57,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9932 transitions. [2021-06-05 16:52:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:57,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:57,587 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:57,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3527 [2021-06-05 16:52:57,787 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash 193360559, now seen corresponding path program 68 times [2021-06-05 16:52:57,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:57,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218928404] [2021-06-05 16:52:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:57,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:57,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218928404] [2021-06-05 16:52:57,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218928404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:57,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664274396] [2021-06-05 16:52:57,829 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 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 16:52:57,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:57,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:57,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:57,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664274396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:57,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:57,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:52:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912750161] [2021-06-05 16:52:57,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:57,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:57,952 INFO L87 Difference]: Start difference. First operand 2862 states and 9932 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:58,552 INFO L93 Difference]: Finished difference Result 5353 states and 17165 transitions. [2021-06-05 16:52:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:52:58,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:58,560 INFO L225 Difference]: With dead ends: 5353 [2021-06-05 16:52:58,560 INFO L226 Difference]: Without dead ends: 5353 [2021-06-05 16:52:58,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:52:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-05 16:52:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 2862. [2021-06-05 16:52:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.473610625655365) internal successors, (9938), 2861 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9938 transitions. [2021-06-05 16:52:58,610 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9938 transitions. Word has length 28 [2021-06-05 16:52:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:58,610 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9938 transitions. [2021-06-05 16:52:58,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9938 transitions. [2021-06-05 16:52:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:58,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:58,614 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:58,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3528 [2021-06-05 16:52:58,814 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:58,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1418439203, now seen corresponding path program 69 times [2021-06-05 16:52:58,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:58,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404510953] [2021-06-05 16:52:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:58,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:58,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404510953] [2021-06-05 16:52:58,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404510953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:58,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741457787] [2021-06-05 16:52:58,856 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 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 16:52:58,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:52:58,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:58,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741457787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:58,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:58,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:52:58,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247553843] [2021-06-05 16:52:58,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:58,960 INFO L87 Difference]: Start difference. First operand 2862 states and 9938 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:59,695 INFO L93 Difference]: Finished difference Result 5672 states and 18078 transitions. [2021-06-05 16:52:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:52:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:59,703 INFO L225 Difference]: With dead ends: 5672 [2021-06-05 16:52:59,703 INFO L226 Difference]: Without dead ends: 5672 [2021-06-05 16:52:59,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:52:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-06-05 16:52:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 2853. [2021-06-05 16:52:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.473702664796634) internal successors, (9907), 2852 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9907 transitions. [2021-06-05 16:52:59,754 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9907 transitions. Word has length 28 [2021-06-05 16:52:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:59,754 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 9907 transitions. [2021-06-05 16:52:59,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9907 transitions. [2021-06-05 16:52:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:59,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:59,757 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:59,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3529 [2021-06-05 16:52:59,957 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1649978851, now seen corresponding path program 70 times [2021-06-05 16:52:59,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:59,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422101718] [2021-06-05 16:52:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:59,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:59,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422101718] [2021-06-05 16:52:59,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422101718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:59,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623772701] [2021-06-05 16:52:59,998 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 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 16:53:00,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:00,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623772701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:00,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:00,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:53:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652436955] [2021-06-05 16:53:00,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:00,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:00,118 INFO L87 Difference]: Start difference. First operand 2853 states and 9907 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:00,955 INFO L93 Difference]: Finished difference Result 6160 states and 19384 transitions. [2021-06-05 16:53:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:53:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:00,965 INFO L225 Difference]: With dead ends: 6160 [2021-06-05 16:53:00,965 INFO L226 Difference]: Without dead ends: 6160 [2021-06-05 16:53:00,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:53:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-05 16:53:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 2913. [2021-06-05 16:53:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4701236263736264) internal successors, (10105), 2912 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10105 transitions. [2021-06-05 16:53:01,030 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10105 transitions. Word has length 28 [2021-06-05 16:53:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:01,030 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10105 transitions. [2021-06-05 16:53:01,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10105 transitions. [2021-06-05 16:53:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:01,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:01,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:01,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3530,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:01,234 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash 707808605, now seen corresponding path program 71 times [2021-06-05 16:53:01,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:01,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110839747] [2021-06-05 16:53:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:01,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110839747] [2021-06-05 16:53:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110839747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634069612] [2021-06-05 16:53:01,268 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 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 16:53:01,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:53:01,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:01,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:01,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634069612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:01,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:01,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:53:01,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354752541] [2021-06-05 16:53:01,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:01,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:01,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:01,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:01,388 INFO L87 Difference]: Start difference. First operand 2913 states and 10105 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:01,921 INFO L93 Difference]: Finished difference Result 6832 states and 22884 transitions. [2021-06-05 16:53:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:53:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:01,931 INFO L225 Difference]: With dead ends: 6832 [2021-06-05 16:53:01,931 INFO L226 Difference]: Without dead ends: 6832 [2021-06-05 16:53:01,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:53:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-05 16:53:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4173. [2021-06-05 16:53:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.5884467881112174) internal successors, (14971), 4172 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 14971 transitions. [2021-06-05 16:53:02,026 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 14971 transitions. Word has length 28 [2021-06-05 16:53:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:02,027 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 14971 transitions. [2021-06-05 16:53:02,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 14971 transitions. [2021-06-05 16:53:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:02,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:02,032 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:02,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:02,232 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -703859107, now seen corresponding path program 72 times [2021-06-05 16:53:02,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:02,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229917529] [2021-06-05 16:53:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:02,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:02,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229917529] [2021-06-05 16:53:02,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229917529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:02,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321823751] [2021-06-05 16:53:02,273 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 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 16:53:02,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:53:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:02,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:02,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321823751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:02,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:02,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:53:02,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361301587] [2021-06-05 16:53:02,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:02,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:02,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:02,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:02,371 INFO L87 Difference]: Start difference. First operand 4173 states and 14971 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:03,200 INFO L93 Difference]: Finished difference Result 7512 states and 25338 transitions. [2021-06-05 16:53:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:53:03,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:03,213 INFO L225 Difference]: With dead ends: 7512 [2021-06-05 16:53:03,214 INFO L226 Difference]: Without dead ends: 7508 [2021-06-05 16:53:03,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:53:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-05 16:53:03,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 4065. [2021-06-05 16:53:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.597194881889764) internal successors, (14619), 4064 states have internal predecessors, (14619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14619 transitions. [2021-06-05 16:53:03,300 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14619 transitions. Word has length 28 [2021-06-05 16:53:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:03,300 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14619 transitions. [2021-06-05 16:53:03,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14619 transitions. [2021-06-05 16:53:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:03,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:03,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:03,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:03,506 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:03,506 INFO L82 PathProgramCache]: Analyzing trace with hash 325457475, now seen corresponding path program 82 times [2021-06-05 16:53:03,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:03,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136074973] [2021-06-05 16:53:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:03,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136074973] [2021-06-05 16:53:03,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136074973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518525984] [2021-06-05 16:53:03,535 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 16:53:03,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:03,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:03,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:03,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518525984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:03,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:03,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:53:03,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297193976] [2021-06-05 16:53:03,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:03,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:03,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:03,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:03,645 INFO L87 Difference]: Start difference. First operand 4065 states and 14619 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:04,494 INFO L93 Difference]: Finished difference Result 8298 states and 27746 transitions. [2021-06-05 16:53:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:53:04,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:04,506 INFO L225 Difference]: With dead ends: 8298 [2021-06-05 16:53:04,507 INFO L226 Difference]: Without dead ends: 8289 [2021-06-05 16:53:04,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:53:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-05 16:53:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 4502. [2021-06-05 16:53:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 3.688735836480782) internal successors, (16603), 4501 states have internal predecessors, (16603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 16603 transitions. [2021-06-05 16:53:04,596 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 16603 transitions. Word has length 28 [2021-06-05 16:53:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:04,596 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 16603 transitions. [2021-06-05 16:53:04,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 16603 transitions. [2021-06-05 16:53:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:04,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:04,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:04,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:04,802 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1928168421, now seen corresponding path program 83 times [2021-06-05 16:53:04,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:04,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883182643] [2021-06-05 16:53:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:04,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:04,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883182643] [2021-06-05 16:53:04,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883182643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:04,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525971157] [2021-06-05 16:53:04,830 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 16:53:04,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:53:04,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:04,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:04,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525971157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:04,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:04,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:53:04,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488592105] [2021-06-05 16:53:04,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:04,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:04,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:04,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:04,970 INFO L87 Difference]: Start difference. First operand 4502 states and 16603 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:05,803 INFO L93 Difference]: Finished difference Result 8567 states and 28576 transitions. [2021-06-05 16:53:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:53:05,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:05,816 INFO L225 Difference]: With dead ends: 8567 [2021-06-05 16:53:05,816 INFO L226 Difference]: Without dead ends: 8567 [2021-06-05 16:53:05,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:53:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-05 16:53:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 4520. [2021-06-05 16:53:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.677362248285019) internal successors, (16618), 4519 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16618 transitions. [2021-06-05 16:53:05,905 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16618 transitions. Word has length 28 [2021-06-05 16:53:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:05,905 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 16618 transitions. [2021-06-05 16:53:05,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16618 transitions. [2021-06-05 16:53:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:05,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:05,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:06,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3534,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:06,112 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:06,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1163392585, now seen corresponding path program 84 times [2021-06-05 16:53:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:06,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020948244] [2021-06-05 16:53:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:06,177 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 16:53:06,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020948244] [2021-06-05 16:53:06,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020948244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269995786] [2021-06-05 16:53:06,178 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 16:53:06,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:53:06,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:06,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:06,264 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 16:53:06,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269995786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:06,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:06,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:53:06,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001435940] [2021-06-05 16:53:06,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:06,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:06,265 INFO L87 Difference]: Start difference. First operand 4520 states and 16618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:06,677 INFO L93 Difference]: Finished difference Result 8001 states and 28114 transitions. [2021-06-05 16:53:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:06,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:06,690 INFO L225 Difference]: With dead ends: 8001 [2021-06-05 16:53:06,690 INFO L226 Difference]: Without dead ends: 7918 [2021-06-05 16:53:06,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:53:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2021-06-05 16:53:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 5964. [2021-06-05 16:53:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 3.7450947509642796) internal successors, (22332), 5963 states have internal predecessors, (22332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 22332 transitions. [2021-06-05 16:53:06,789 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 22332 transitions. Word has length 28 [2021-06-05 16:53:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:06,789 INFO L482 AbstractCegarLoop]: Abstraction has 5964 states and 22332 transitions. [2021-06-05 16:53:06,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 22332 transitions. [2021-06-05 16:53:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:06,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:06,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:06,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3535,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:06,998 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1923559731, now seen corresponding path program 85 times [2021-06-05 16:53:06,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:06,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17425245] [2021-06-05 16:53:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:07,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17425245] [2021-06-05 16:53:07,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17425245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832270903] [2021-06-05 16:53:07,025 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 16:53:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:07,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:53:07,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:07,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832270903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:07,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:07,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:53:07,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012023631] [2021-06-05 16:53:07,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:53:07,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:07,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:53:07,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:53:07,102 INFO L87 Difference]: Start difference. First operand 5964 states and 22332 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:07,276 INFO L93 Difference]: Finished difference Result 8265 states and 28982 transitions. [2021-06-05 16:53:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:53:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:07,288 INFO L225 Difference]: With dead ends: 8265 [2021-06-05 16:53:07,288 INFO L226 Difference]: Without dead ends: 8265 [2021-06-05 16:53:07,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:53:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-06-05 16:53:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 6071. [2021-06-05 16:53:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6071 states, 6070 states have (on average 3.7255354200988466) internal successors, (22614), 6070 states have internal predecessors, (22614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6071 states to 6071 states and 22614 transitions. [2021-06-05 16:53:07,383 INFO L78 Accepts]: Start accepts. Automaton has 6071 states and 22614 transitions. Word has length 28 [2021-06-05 16:53:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:07,383 INFO L482 AbstractCegarLoop]: Abstraction has 6071 states and 22614 transitions. [2021-06-05 16:53:07,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6071 states and 22614 transitions. [2021-06-05 16:53:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:07,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:07,390 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:07,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3536,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:07,591 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:07,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:07,591 INFO L82 PathProgramCache]: Analyzing trace with hash -993359987, now seen corresponding path program 86 times [2021-06-05 16:53:07,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:07,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622806714] [2021-06-05 16:53:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:07,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:07,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622806714] [2021-06-05 16:53:07,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622806714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:07,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290797458] [2021-06-05 16:53:07,631 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 16:53:07,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:07,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:07,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290797458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:07,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:07,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:53:07,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131579420] [2021-06-05 16:53:07,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:07,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:07,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:07,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:07,723 INFO L87 Difference]: Start difference. First operand 6071 states and 22614 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:08,490 INFO L93 Difference]: Finished difference Result 12605 states and 43798 transitions. [2021-06-05 16:53:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:53:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:08,514 INFO L225 Difference]: With dead ends: 12605 [2021-06-05 16:53:08,514 INFO L226 Difference]: Without dead ends: 12605 [2021-06-05 16:53:08,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:53:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2021-06-05 16:53:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 6726. [2021-06-05 16:53:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6725 states have (on average 3.7414126394052043) internal successors, (25161), 6725 states have internal predecessors, (25161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 25161 transitions. [2021-06-05 16:53:08,659 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 25161 transitions. Word has length 28 [2021-06-05 16:53:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:08,660 INFO L482 AbstractCegarLoop]: Abstraction has 6726 states and 25161 transitions. [2021-06-05 16:53:08,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 25161 transitions. [2021-06-05 16:53:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:08,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:08,669 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:08,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3537 [2021-06-05 16:53:08,869 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash 909319465, now seen corresponding path program 87 times [2021-06-05 16:53:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:08,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294745245] [2021-06-05 16:53:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:08,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:08,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294745245] [2021-06-05 16:53:08,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294745245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:08,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162743399] [2021-06-05 16:53:08,904 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 16:53:08,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:53:08,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:08,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162743399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:08,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:08,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:53:08,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096005069] [2021-06-05 16:53:08,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:08,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:08,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:08,994 INFO L87 Difference]: Start difference. First operand 6726 states and 25161 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:09,637 INFO L93 Difference]: Finished difference Result 12718 states and 44233 transitions. [2021-06-05 16:53:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:53:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:09,658 INFO L225 Difference]: With dead ends: 12718 [2021-06-05 16:53:09,658 INFO L226 Difference]: Without dead ends: 12718 [2021-06-05 16:53:09,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:53:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-06-05 16:53:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 6962. [2021-06-05 16:53:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.7214480678063495) internal successors, (25905), 6961 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 25905 transitions. [2021-06-05 16:53:09,844 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 25905 transitions. Word has length 28 [2021-06-05 16:53:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:09,844 INFO L482 AbstractCegarLoop]: Abstraction has 6962 states and 25905 transitions. [2021-06-05 16:53:09,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 25905 transitions. [2021-06-05 16:53:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:09,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:09,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:10,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:10,055 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash -173703191, now seen corresponding path program 88 times [2021-06-05 16:53:10,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:10,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938366864] [2021-06-05 16:53:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:10,083 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 16:53:10,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:10,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938366864] [2021-06-05 16:53:10,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938366864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:10,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457544940] [2021-06-05 16:53:10,083 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 16:53:10,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:10,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:10,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:10,172 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 16:53:10,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457544940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:10,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:10,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:53:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709154260] [2021-06-05 16:53:10,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:53:10,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:10,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:53:10,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:53:10,172 INFO L87 Difference]: Start difference. First operand 6962 states and 25905 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:10,521 INFO L93 Difference]: Finished difference Result 9470 states and 33921 transitions. [2021-06-05 16:53:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:53:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:10,537 INFO L225 Difference]: With dead ends: 9470 [2021-06-05 16:53:10,537 INFO L226 Difference]: Without dead ends: 9440 [2021-06-05 16:53:10,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:53:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2021-06-05 16:53:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 7814. [2021-06-05 16:53:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7813 states have (on average 3.749904006143607) internal successors, (29298), 7813 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 29298 transitions. [2021-06-05 16:53:10,672 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 29298 transitions. Word has length 28 [2021-06-05 16:53:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:10,673 INFO L482 AbstractCegarLoop]: Abstraction has 7814 states and 29298 transitions. [2021-06-05 16:53:10,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 29298 transitions. [2021-06-05 16:53:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:10,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:10,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:10,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3539 [2021-06-05 16:53:10,884 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1297374927, now seen corresponding path program 89 times [2021-06-05 16:53:10,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:10,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120098303] [2021-06-05 16:53:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:10,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120098303] [2021-06-05 16:53:10,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120098303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922573109] [2021-06-05 16:53:10,911 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 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 16:53:10,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:53:10,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:10,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922573109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:10,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:10,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:53:10,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479746876] [2021-06-05 16:53:10,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:53:10,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:10,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:53:10,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:53:10,997 INFO L87 Difference]: Start difference. First operand 7814 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:11,333 INFO L93 Difference]: Finished difference Result 10065 states and 35894 transitions. [2021-06-05 16:53:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:53:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:11,350 INFO L225 Difference]: With dead ends: 10065 [2021-06-05 16:53:11,350 INFO L226 Difference]: Without dead ends: 10065 [2021-06-05 16:53:11,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:53:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2021-06-05 16:53:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 7854. [2021-06-05 16:53:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 3.7459569591239017) internal successors, (29417), 7853 states have internal predecessors, (29417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 29417 transitions. [2021-06-05 16:53:11,488 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 29417 transitions. Word has length 28 [2021-06-05 16:53:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:11,488 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 29417 transitions. [2021-06-05 16:53:11,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 29417 transitions. [2021-06-05 16:53:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:11,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:11,499 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:11,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3540 [2021-06-05 16:53:11,701 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1855439209, now seen corresponding path program 90 times [2021-06-05 16:53:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:11,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581876948] [2021-06-05 16:53:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:11,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581876948] [2021-06-05 16:53:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581876948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602450208] [2021-06-05 16:53:11,782 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 16:53:11,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:53:11,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:11,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:11,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602450208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:11,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:11,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:53:11,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610765204] [2021-06-05 16:53:11,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:11,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:11,864 INFO L87 Difference]: Start difference. First operand 7854 states and 29417 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:12,455 INFO L93 Difference]: Finished difference Result 13425 states and 47598 transitions. [2021-06-05 16:53:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:53:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:12,479 INFO L225 Difference]: With dead ends: 13425 [2021-06-05 16:53:12,479 INFO L226 Difference]: Without dead ends: 13421 [2021-06-05 16:53:12,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:53:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-05 16:53:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7752. [2021-06-05 16:53:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.7497097148755) internal successors, (29064), 7751 states have internal predecessors, (29064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29064 transitions. [2021-06-05 16:53:12,647 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29064 transitions. Word has length 28 [2021-06-05 16:53:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:12,647 INFO L482 AbstractCegarLoop]: Abstraction has 7752 states and 29064 transitions. [2021-06-05 16:53:12,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29064 transitions. [2021-06-05 16:53:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:12,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:12,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:12,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:12,858 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash 812772317, now seen corresponding path program 91 times [2021-06-05 16:53:12,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:12,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881506127] [2021-06-05 16:53:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:12,892 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 16:53:12,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881506127] [2021-06-05 16:53:12,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881506127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561343792] [2021-06-05 16:53:12,893 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 16:53:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:12,979 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 16:53:12,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561343792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:12,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:12,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:53:12,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211935774] [2021-06-05 16:53:12,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:12,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:12,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:12,980 INFO L87 Difference]: Start difference. First operand 7752 states and 29064 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:13,414 INFO L93 Difference]: Finished difference Result 10276 states and 36673 transitions. [2021-06-05 16:53:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:53:13,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:13,432 INFO L225 Difference]: With dead ends: 10276 [2021-06-05 16:53:13,433 INFO L226 Difference]: Without dead ends: 10276 [2021-06-05 16:53:13,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:53:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10276 states. [2021-06-05 16:53:13,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10276 to 7683. [2021-06-05 16:53:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.743686539963551) internal successors, (28759), 7682 states have internal predecessors, (28759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28759 transitions. [2021-06-05 16:53:13,616 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28759 transitions. Word has length 28 [2021-06-05 16:53:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:13,616 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28759 transitions. [2021-06-05 16:53:13,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28759 transitions. [2021-06-05 16:53:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:13,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:13,627 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:13,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3542 [2021-06-05 16:53:13,827 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash 933737069, now seen corresponding path program 92 times [2021-06-05 16:53:13,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:13,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839291916] [2021-06-05 16:53:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:13,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:13,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839291916] [2021-06-05 16:53:13,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839291916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:13,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120023627] [2021-06-05 16:53:13,868 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 16:53:13,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:13,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:13,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:13,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120023627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:13,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:13,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:53:13,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502408999] [2021-06-05 16:53:13,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:13,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:13,952 INFO L87 Difference]: Start difference. First operand 7683 states and 28759 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:14,625 INFO L93 Difference]: Finished difference Result 13291 states and 47039 transitions. [2021-06-05 16:53:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:53:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:14,649 INFO L225 Difference]: With dead ends: 13291 [2021-06-05 16:53:14,649 INFO L226 Difference]: Without dead ends: 13279 [2021-06-05 16:53:14,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:53:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-06-05 16:53:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 7683. [2021-06-05 16:53:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.7431658422285863) internal successors, (28755), 7682 states have internal predecessors, (28755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28755 transitions. [2021-06-05 16:53:14,812 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28755 transitions. Word has length 28 [2021-06-05 16:53:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:14,812 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28755 transitions. [2021-06-05 16:53:14,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28755 transitions. [2021-06-05 16:53:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:14,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:14,823 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:15,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:15,023 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:15,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash -306445935, now seen corresponding path program 93 times [2021-06-05 16:53:15,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:15,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851947287] [2021-06-05 16:53:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:15,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:15,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851947287] [2021-06-05 16:53:15,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851947287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:15,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804495180] [2021-06-05 16:53:15,064 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 16:53:15,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:53:15,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:15,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:15,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804495180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:15,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:15,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:53:15,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400913905] [2021-06-05 16:53:15,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:15,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:15,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:15,162 INFO L87 Difference]: Start difference. First operand 7683 states and 28755 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:16,322 INFO L93 Difference]: Finished difference Result 20069 states and 69965 transitions. [2021-06-05 16:53:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:53:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:16,360 INFO L225 Difference]: With dead ends: 20069 [2021-06-05 16:53:16,360 INFO L226 Difference]: Without dead ends: 20069 [2021-06-05 16:53:16,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:53:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2021-06-05 16:53:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 10444. [2021-06-05 16:53:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 3.790577420281528) internal successors, (39585), 10443 states have internal predecessors, (39585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 39585 transitions. [2021-06-05 16:53:16,647 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 39585 transitions. Word has length 28 [2021-06-05 16:53:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:16,647 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 39585 transitions. [2021-06-05 16:53:16,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 39585 transitions. [2021-06-05 16:53:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:16,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:16,662 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:16,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3544,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:16,862 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:16,863 INFO L82 PathProgramCache]: Analyzing trace with hash 765871039, now seen corresponding path program 94 times [2021-06-05 16:53:16,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:16,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482797778] [2021-06-05 16:53:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:16,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:16,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482797778] [2021-06-05 16:53:16,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482797778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:16,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940566958] [2021-06-05 16:53:16,903 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 16:53:16,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:16,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:16,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:16,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940566958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:16,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:16,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:53:16,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750241209] [2021-06-05 16:53:16,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:16,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:16,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:16,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:16,994 INFO L87 Difference]: Start difference. First operand 10444 states and 39585 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:18,150 INFO L93 Difference]: Finished difference Result 19312 states and 67991 transitions. [2021-06-05 16:53:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:53:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:18,189 INFO L225 Difference]: With dead ends: 19312 [2021-06-05 16:53:18,189 INFO L226 Difference]: Without dead ends: 19300 [2021-06-05 16:53:18,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:53:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19300 states. [2021-06-05 16:53:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19300 to 10242. [2021-06-05 16:53:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10242 states, 10241 states have (on average 3.799043062200957) internal successors, (38906), 10241 states have internal predecessors, (38906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10242 states to 10242 states and 38906 transitions. [2021-06-05 16:53:18,479 INFO L78 Accepts]: Start accepts. Automaton has 10242 states and 38906 transitions. Word has length 28 [2021-06-05 16:53:18,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:18,479 INFO L482 AbstractCegarLoop]: Abstraction has 10242 states and 38906 transitions. [2021-06-05 16:53:18,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 10242 states and 38906 transitions. [2021-06-05 16:53:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:18,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:18,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:18,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3545,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:18,695 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2026707565, now seen corresponding path program 95 times [2021-06-05 16:53:18,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:18,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025267269] [2021-06-05 16:53:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:18,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:18,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025267269] [2021-06-05 16:53:18,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025267269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894580490] [2021-06-05 16:53:18,737 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 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 16:53:18,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:53:18,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894580490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:18,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:18,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:53:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857845213] [2021-06-05 16:53:18,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:18,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:18,829 INFO L87 Difference]: Start difference. First operand 10242 states and 38906 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:19,846 INFO L93 Difference]: Finished difference Result 19128 states and 67337 transitions. [2021-06-05 16:53:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:53:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:19,882 INFO L225 Difference]: With dead ends: 19128 [2021-06-05 16:53:19,882 INFO L226 Difference]: Without dead ends: 19092 [2021-06-05 16:53:19,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:53:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19092 states. [2021-06-05 16:53:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19092 to 10290. [2021-06-05 16:53:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 3.7970648265137528) internal successors, (39068), 10289 states have internal predecessors, (39068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 39068 transitions. [2021-06-05 16:53:20,188 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 39068 transitions. Word has length 28 [2021-06-05 16:53:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:20,189 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 39068 transitions. [2021-06-05 16:53:20,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:20,189 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 39068 transitions. [2021-06-05 16:53:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:20,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:20,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:20,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:20,404 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1595973395, now seen corresponding path program 96 times [2021-06-05 16:53:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:20,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685215258] [2021-06-05 16:53:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:20,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:20,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685215258] [2021-06-05 16:53:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685215258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506367703] [2021-06-05 16:53:20,446 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 16:53:20,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:53:20,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506367703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:20,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:20,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:53:20,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230742803] [2021-06-05 16:53:20,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:20,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:20,585 INFO L87 Difference]: Start difference. First operand 10290 states and 39068 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:21,986 INFO L93 Difference]: Finished difference Result 19050 states and 67176 transitions. [2021-06-05 16:53:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:53:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:22,022 INFO L225 Difference]: With dead ends: 19050 [2021-06-05 16:53:22,022 INFO L226 Difference]: Without dead ends: 19050 [2021-06-05 16:53:22,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:53:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19050 states. [2021-06-05 16:53:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19050 to 10488. [2021-06-05 16:53:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10488 states, 10487 states have (on average 3.787832554591399) internal successors, (39723), 10487 states have internal predecessors, (39723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10488 states to 10488 states and 39723 transitions. [2021-06-05 16:53:22,340 INFO L78 Accepts]: Start accepts. Automaton has 10488 states and 39723 transitions. Word has length 28 [2021-06-05 16:53:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:22,340 INFO L482 AbstractCegarLoop]: Abstraction has 10488 states and 39723 transitions. [2021-06-05 16:53:22,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 10488 states and 39723 transitions. [2021-06-05 16:53:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:22,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:22,355 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:22,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3547 [2021-06-05 16:53:22,556 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:22,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1643616507, now seen corresponding path program 97 times [2021-06-05 16:53:22,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:22,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887151629] [2021-06-05 16:53:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:22,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887151629] [2021-06-05 16:53:22,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887151629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50461276] [2021-06-05 16:53:22,596 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 16:53:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:22,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:22,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50461276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:22,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:22,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:53:22,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836934272] [2021-06-05 16:53:22,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:22,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:22,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:22,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:22,716 INFO L87 Difference]: Start difference. First operand 10488 states and 39723 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:23,928 INFO L93 Difference]: Finished difference Result 18660 states and 66098 transitions. [2021-06-05 16:53:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:53:23,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:23,963 INFO L225 Difference]: With dead ends: 18660 [2021-06-05 16:53:23,963 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 16:53:23,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:53:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 16:53:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 10366. [2021-06-05 16:53:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 3.7916063675832126) internal successors, (39300), 10365 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 39300 transitions. [2021-06-05 16:53:24,312 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 39300 transitions. Word has length 28 [2021-06-05 16:53:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 39300 transitions. [2021-06-05 16:53:24,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 39300 transitions. [2021-06-05 16:53:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:24,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:24,326 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:24,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3548,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:24,528 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:24,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1168215851, now seen corresponding path program 98 times [2021-06-05 16:53:24,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:24,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066927222] [2021-06-05 16:53:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:24,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:24,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066927222] [2021-06-05 16:53:24,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066927222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:24,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65316611] [2021-06-05 16:53:24,569 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 16:53:24,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:24,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:24,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:24,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65316611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:24,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:24,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:53:24,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980515736] [2021-06-05 16:53:24,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:53:24,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:53:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:53:24,671 INFO L87 Difference]: Start difference. First operand 10366 states and 39300 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:25,734 INFO L93 Difference]: Finished difference Result 17898 states and 64003 transitions. [2021-06-05 16:53:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:53:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:25,768 INFO L225 Difference]: With dead ends: 17898 [2021-06-05 16:53:25,769 INFO L226 Difference]: Without dead ends: 17862 [2021-06-05 16:53:25,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:53:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2021-06-05 16:53:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 10386. [2021-06-05 16:53:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10386 states, 10385 states have (on average 3.7906596051998074) internal successors, (39366), 10385 states have internal predecessors, (39366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10386 states to 10386 states and 39366 transitions. [2021-06-05 16:53:26,004 INFO L78 Accepts]: Start accepts. Automaton has 10386 states and 39366 transitions. Word has length 28 [2021-06-05 16:53:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:26,004 INFO L482 AbstractCegarLoop]: Abstraction has 10386 states and 39366 transitions. [2021-06-05 16:53:26,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10386 states and 39366 transitions. [2021-06-05 16:53:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:26,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:26,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:26,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 16:53:26,220 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1708660749, now seen corresponding path program 99 times [2021-06-05 16:53:26,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:26,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895201376] [2021-06-05 16:53:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:26,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895201376] [2021-06-05 16:53:26,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895201376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032056304] [2021-06-05 16:53:26,256 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 16:53:26,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:53:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:26,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032056304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:26,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:53:26,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726280927] [2021-06-05 16:53:26,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:26,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:26,387 INFO L87 Difference]: Start difference. First operand 10386 states and 39366 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:27,819 INFO L93 Difference]: Finished difference Result 26075 states and 92737 transitions. [2021-06-05 16:53:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:53:27,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:27,879 INFO L225 Difference]: With dead ends: 26075 [2021-06-05 16:53:27,879 INFO L226 Difference]: Without dead ends: 26075 [2021-06-05 16:53:27,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 834.9ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:53:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26075 states. [2021-06-05 16:53:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26075 to 10692. [2021-06-05 16:53:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 3.8184454213824712) internal successors, (40823), 10691 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 40823 transitions. [2021-06-05 16:53:28,217 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 40823 transitions. Word has length 28 [2021-06-05 16:53:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:28,218 INFO L482 AbstractCegarLoop]: Abstraction has 10692 states and 40823 transitions. [2021-06-05 16:53:28,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 40823 transitions. [2021-06-05 16:53:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:28,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:28,233 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:28,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3550,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:28,433 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:28,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:28,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1057401903, now seen corresponding path program 100 times [2021-06-05 16:53:28,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:28,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841230069] [2021-06-05 16:53:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:28,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:28,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841230069] [2021-06-05 16:53:28,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841230069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:28,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303909069] [2021-06-05 16:53:28,470 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 16:53:28,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:28,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:28,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:28,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303909069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:28,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:28,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:53:28,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288916561] [2021-06-05 16:53:28,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:28,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:28,599 INFO L87 Difference]: Start difference. First operand 10692 states and 40823 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:29,835 INFO L93 Difference]: Finished difference Result 25519 states and 91410 transitions. [2021-06-05 16:53:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:53:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:29,957 INFO L225 Difference]: With dead ends: 25519 [2021-06-05 16:53:29,958 INFO L226 Difference]: Without dead ends: 25519 [2021-06-05 16:53:29,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:53:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25519 states. [2021-06-05 16:53:30,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25519 to 10592. [2021-06-05 16:53:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.8053063922198094) internal successors, (40302), 10591 states have internal predecessors, (40302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40302 transitions. [2021-06-05 16:53:30,223 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40302 transitions. Word has length 28 [2021-06-05 16:53:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:30,223 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40302 transitions. [2021-06-05 16:53:30,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40302 transitions. [2021-06-05 16:53:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:30,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:30,238 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:30,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-05 16:53:30,438 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1158271565, now seen corresponding path program 101 times [2021-06-05 16:53:30,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:30,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700045863] [2021-06-05 16:53:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:30,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:30,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700045863] [2021-06-05 16:53:30,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700045863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:30,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446385479] [2021-06-05 16:53:30,474 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 16:53:30,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:53:30,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:30,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446385479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:30,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:30,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:53:30,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724290047] [2021-06-05 16:53:30,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:53:30,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:30,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:53:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:53:30,593 INFO L87 Difference]: Start difference. First operand 10592 states and 40302 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:31,474 INFO L93 Difference]: Finished difference Result 20262 states and 72808 transitions. [2021-06-05 16:53:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:53:31,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:31,512 INFO L225 Difference]: With dead ends: 20262 [2021-06-05 16:53:31,512 INFO L226 Difference]: Without dead ends: 20262 [2021-06-05 16:53:31,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:53:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20262 states. [2021-06-05 16:53:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20262 to 10601. [2021-06-05 16:53:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.8042452830188678) internal successors, (40325), 10600 states have internal predecessors, (40325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 40325 transitions. [2021-06-05 16:53:31,755 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 40325 transitions. Word has length 28 [2021-06-05 16:53:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:31,755 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 40325 transitions. [2021-06-05 16:53:31,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 40325 transitions. [2021-06-05 16:53:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:31,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:31,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:31,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:31,971 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:31,972 INFO L82 PathProgramCache]: Analyzing trace with hash 545777745, now seen corresponding path program 102 times [2021-06-05 16:53:31,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:31,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142307753] [2021-06-05 16:53:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:32,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:32,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142307753] [2021-06-05 16:53:32,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142307753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:32,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364850786] [2021-06-05 16:53:32,008 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 16:53:32,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:53:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:32,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364850786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:32,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:32,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:53:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988589681] [2021-06-05 16:53:32,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:53:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:53:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:53:32,129 INFO L87 Difference]: Start difference. First operand 10601 states and 40325 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:32,946 INFO L93 Difference]: Finished difference Result 18811 states and 68168 transitions. [2021-06-05 16:53:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:53:32,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:32,982 INFO L225 Difference]: With dead ends: 18811 [2021-06-05 16:53:32,982 INFO L226 Difference]: Without dead ends: 18811 [2021-06-05 16:53:32,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:53:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18811 states. [2021-06-05 16:53:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18811 to 10613. [2021-06-05 16:53:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.80352431209951) internal successors, (40363), 10612 states have internal predecessors, (40363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 40363 transitions. [2021-06-05 16:53:33,244 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 40363 transitions. Word has length 28 [2021-06-05 16:53:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:33,244 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 40363 transitions. [2021-06-05 16:53:33,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 40363 transitions. [2021-06-05 16:53:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:33,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:33,260 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:33,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:33,460 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:33,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:33,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1430395937, now seen corresponding path program 103 times [2021-06-05 16:53:33,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:33,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314125409] [2021-06-05 16:53:33,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:33,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:33,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314125409] [2021-06-05 16:53:33,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314125409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:33,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685898143] [2021-06-05 16:53:33,496 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 16:53:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:33,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685898143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:33,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:33,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:53:33,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151303418] [2021-06-05 16:53:33,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:33,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:33,624 INFO L87 Difference]: Start difference. First operand 10613 states and 40363 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:34,741 INFO L93 Difference]: Finished difference Result 19418 states and 69911 transitions. [2021-06-05 16:53:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:53:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:34,779 INFO L225 Difference]: With dead ends: 19418 [2021-06-05 16:53:34,779 INFO L226 Difference]: Without dead ends: 19418 [2021-06-05 16:53:34,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 704.0ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:53:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-06-05 16:53:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 10725. [2021-06-05 16:53:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 10724 states have (on average 3.7958784035807533) internal successors, (40707), 10724 states have internal predecessors, (40707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 40707 transitions. [2021-06-05 16:53:35,050 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 40707 transitions. Word has length 28 [2021-06-05 16:53:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:35,050 INFO L482 AbstractCegarLoop]: Abstraction has 10725 states and 40707 transitions. [2021-06-05 16:53:35,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 40707 transitions. [2021-06-05 16:53:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:35,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:35,138 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:35,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3554,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:35,338 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:35,339 INFO L82 PathProgramCache]: Analyzing trace with hash 375018543, now seen corresponding path program 104 times [2021-06-05 16:53:35,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:35,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120910694] [2021-06-05 16:53:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:35,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120910694] [2021-06-05 16:53:35,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120910694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8204200] [2021-06-05 16:53:35,374 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 16:53:35,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:35,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:35,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8204200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:35,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:35,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:53:35,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11680871] [2021-06-05 16:53:35,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:35,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:35,499 INFO L87 Difference]: Start difference. First operand 10725 states and 40707 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:36,458 INFO L93 Difference]: Finished difference Result 18990 states and 68747 transitions. [2021-06-05 16:53:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:53:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:36,493 INFO L225 Difference]: With dead ends: 18990 [2021-06-05 16:53:36,493 INFO L226 Difference]: Without dead ends: 18986 [2021-06-05 16:53:36,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:53:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18986 states. [2021-06-05 16:53:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18986 to 10651. [2021-06-05 16:53:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10651 states, 10650 states have (on average 3.7998122065727697) internal successors, (40468), 10650 states have internal predecessors, (40468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10651 states to 10651 states and 40468 transitions. [2021-06-05 16:53:36,750 INFO L78 Accepts]: Start accepts. Automaton has 10651 states and 40468 transitions. Word has length 28 [2021-06-05 16:53:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:36,750 INFO L482 AbstractCegarLoop]: Abstraction has 10651 states and 40468 transitions. [2021-06-05 16:53:36,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10651 states and 40468 transitions. [2021-06-05 16:53:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:36,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:36,769 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:36,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:36,985 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -156751667, now seen corresponding path program 105 times [2021-06-05 16:53:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828095550] [2021-06-05 16:53:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:37,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:37,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828095550] [2021-06-05 16:53:37,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828095550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:37,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782158954] [2021-06-05 16:53:37,039 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 16:53:37,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:53:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:37,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:37,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782158954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:37,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:37,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:37,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670093970] [2021-06-05 16:53:37,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:37,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:37,162 INFO L87 Difference]: Start difference. First operand 10651 states and 40468 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:38,233 INFO L93 Difference]: Finished difference Result 18417 states and 66232 transitions. [2021-06-05 16:53:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:53:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:38,266 INFO L225 Difference]: With dead ends: 18417 [2021-06-05 16:53:38,266 INFO L226 Difference]: Without dead ends: 18417 [2021-06-05 16:53:38,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 675.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:53:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18417 states. [2021-06-05 16:53:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18417 to 10878. [2021-06-05 16:53:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10878 states, 10877 states have (on average 3.803070699641445) internal successors, (41366), 10877 states have internal predecessors, (41366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10878 states to 10878 states and 41366 transitions. [2021-06-05 16:53:38,568 INFO L78 Accepts]: Start accepts. Automaton has 10878 states and 41366 transitions. Word has length 28 [2021-06-05 16:53:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:38,568 INFO L482 AbstractCegarLoop]: Abstraction has 10878 states and 41366 transitions. [2021-06-05 16:53:38,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 10878 states and 41366 transitions. [2021-06-05 16:53:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:38,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:38,583 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:38,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3556 [2021-06-05 16:53:38,784 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:38,784 INFO L82 PathProgramCache]: Analyzing trace with hash -534318835, now seen corresponding path program 106 times [2021-06-05 16:53:38,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:38,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119571323] [2021-06-05 16:53:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:38,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:38,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119571323] [2021-06-05 16:53:38,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119571323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:38,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827427557] [2021-06-05 16:53:38,825 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 16:53:38,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:38,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:38,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:38,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:38,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827427557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:38,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:38,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:38,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095248651] [2021-06-05 16:53:38,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:38,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:38,940 INFO L87 Difference]: Start difference. First operand 10878 states and 41366 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:39,911 INFO L93 Difference]: Finished difference Result 18127 states and 65426 transitions. [2021-06-05 16:53:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:53:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:39,946 INFO L225 Difference]: With dead ends: 18127 [2021-06-05 16:53:39,946 INFO L226 Difference]: Without dead ends: 18115 [2021-06-05 16:53:39,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 572.0ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:53:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2021-06-05 16:53:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 10980. [2021-06-05 16:53:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.79715821113034) internal successors, (41689), 10979 states have internal predecessors, (41689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41689 transitions. [2021-06-05 16:53:40,210 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41689 transitions. Word has length 28 [2021-06-05 16:53:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:40,210 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41689 transitions. [2021-06-05 16:53:40,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41689 transitions. [2021-06-05 16:53:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:40,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:40,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:40,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:40,427 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1732149001, now seen corresponding path program 73 times [2021-06-05 16:53:40,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:40,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841652504] [2021-06-05 16:53:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:40,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:40,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841652504] [2021-06-05 16:53:40,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841652504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:40,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189380094] [2021-06-05 16:53:40,468 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 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 16:53:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:40,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189380094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:40,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:40,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:53:40,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320033325] [2021-06-05 16:53:40,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:40,556 INFO L87 Difference]: Start difference. First operand 10980 states and 41689 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:41,007 INFO L93 Difference]: Finished difference Result 15635 states and 57800 transitions. [2021-06-05 16:53:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:41,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:41,098 INFO L225 Difference]: With dead ends: 15635 [2021-06-05 16:53:41,098 INFO L226 Difference]: Without dead ends: 15635 [2021-06-05 16:53:41,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:53:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15635 states. [2021-06-05 16:53:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15635 to 11052. [2021-06-05 16:53:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 11051 states have (on average 3.7925074653877475) internal successors, (41911), 11051 states have internal predecessors, (41911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 41911 transitions. [2021-06-05 16:53:41,381 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 41911 transitions. Word has length 28 [2021-06-05 16:53:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:41,381 INFO L482 AbstractCegarLoop]: Abstraction has 11052 states and 41911 transitions. [2021-06-05 16:53:41,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 41911 transitions. [2021-06-05 16:53:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:41,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:41,399 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:41,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3558,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:41,599 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash -38357591, now seen corresponding path program 74 times [2021-06-05 16:53:41,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:41,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297745604] [2021-06-05 16:53:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:41,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:41,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297745604] [2021-06-05 16:53:41,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297745604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:41,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348870659] [2021-06-05 16:53:41,638 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 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 16:53:41,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:41,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348870659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:41,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:41,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:53:41,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45097007] [2021-06-05 16:53:41,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:41,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:41,739 INFO L87 Difference]: Start difference. First operand 11052 states and 41911 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:42,293 INFO L93 Difference]: Finished difference Result 16589 states and 60571 transitions. [2021-06-05 16:53:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:53:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:42,324 INFO L225 Difference]: With dead ends: 16589 [2021-06-05 16:53:42,325 INFO L226 Difference]: Without dead ends: 16589 [2021-06-05 16:53:42,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:53:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16589 states. [2021-06-05 16:53:42,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16589 to 11366. [2021-06-05 16:53:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.7756269247690275) internal successors, (42910), 11365 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 42910 transitions. [2021-06-05 16:53:42,565 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 42910 transitions. Word has length 28 [2021-06-05 16:53:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:42,565 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 42910 transitions. [2021-06-05 16:53:42,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 42910 transitions. [2021-06-05 16:53:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:42,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:42,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:42,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3559,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:42,781 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash 907762153, now seen corresponding path program 75 times [2021-06-05 16:53:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:42,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939942805] [2021-06-05 16:53:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:42,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:42,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939942805] [2021-06-05 16:53:42,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939942805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:42,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611587976] [2021-06-05 16:53:42,816 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 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 16:53:42,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:53:42,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:42,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:42,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:42,898 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 16:53:42,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611587976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:42,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:42,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:53:42,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50991729] [2021-06-05 16:53:42,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:42,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:42,899 INFO L87 Difference]: Start difference. First operand 11366 states and 42910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:43,320 INFO L93 Difference]: Finished difference Result 16097 states and 59284 transitions. [2021-06-05 16:53:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:53:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:43,351 INFO L225 Difference]: With dead ends: 16097 [2021-06-05 16:53:43,351 INFO L226 Difference]: Without dead ends: 16089 [2021-06-05 16:53:43,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:53:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-05 16:53:43,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 11306. [2021-06-05 16:53:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11305 states have (on average 3.77797434763379) internal successors, (42710), 11305 states have internal predecessors, (42710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 42710 transitions. [2021-06-05 16:53:43,599 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 42710 transitions. Word has length 28 [2021-06-05 16:53:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:43,599 INFO L482 AbstractCegarLoop]: Abstraction has 11306 states and 42710 transitions. [2021-06-05 16:53:43,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 42710 transitions. [2021-06-05 16:53:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:43,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:43,615 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:43,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3560,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:43,815 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash -13939987, now seen corresponding path program 76 times [2021-06-05 16:53:43,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:43,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331331254] [2021-06-05 16:53:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:43,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:43,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331331254] [2021-06-05 16:53:43,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331331254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:43,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702226308] [2021-06-05 16:53:43,862 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 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 16:53:43,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:43,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702226308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:43,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:43,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:53:43,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689683408] [2021-06-05 16:53:43,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:43,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:43,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:43,945 INFO L87 Difference]: Start difference. First operand 11306 states and 42710 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:44,439 INFO L93 Difference]: Finished difference Result 15997 states and 59000 transitions. [2021-06-05 16:53:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:53:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:44,469 INFO L225 Difference]: With dead ends: 15997 [2021-06-05 16:53:44,469 INFO L226 Difference]: Without dead ends: 15985 [2021-06-05 16:53:44,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:53:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2021-06-05 16:53:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 11272. [2021-06-05 16:53:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.780055008428711) internal successors, (42605), 11271 states have internal predecessors, (42605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 42605 transitions. [2021-06-05 16:53:44,695 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 42605 transitions. Word has length 28 [2021-06-05 16:53:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:44,695 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 42605 transitions. [2021-06-05 16:53:44,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 42605 transitions. [2021-06-05 16:53:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:44,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:44,711 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:44,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-06-05 16:53:44,911 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -141251547, now seen corresponding path program 77 times [2021-06-05 16:53:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:44,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952401435] [2021-06-05 16:53:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:44,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:44,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952401435] [2021-06-05 16:53:44,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952401435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:44,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629746742] [2021-06-05 16:53:44,947 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 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 16:53:44,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:53:44,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629746742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:45,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:45,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:53:45,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851775160] [2021-06-05 16:53:45,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:53:45,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:45,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:53:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:53:45,067 INFO L87 Difference]: Start difference. First operand 11272 states and 42605 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:46,025 INFO L93 Difference]: Finished difference Result 21775 states and 77547 transitions. [2021-06-05 16:53:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:53:46,025 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:46,074 INFO L225 Difference]: With dead ends: 21775 [2021-06-05 16:53:46,074 INFO L226 Difference]: Without dead ends: 21775 [2021-06-05 16:53:46,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:53:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-05 16:53:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 11246. [2021-06-05 16:53:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 11245 states have (on average 3.779101823032459) internal successors, (42496), 11245 states have internal predecessors, (42496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 42496 transitions. [2021-06-05 16:53:46,369 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 42496 transitions. Word has length 28 [2021-06-05 16:53:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:46,369 INFO L482 AbstractCegarLoop]: Abstraction has 11246 states and 42496 transitions. [2021-06-05 16:53:46,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 42496 transitions. [2021-06-05 16:53:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:46,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:46,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:46,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-06-05 16:53:46,587 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash 385520361, now seen corresponding path program 107 times [2021-06-05 16:53:46,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:46,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95405565] [2021-06-05 16:53:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:46,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:46,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95405565] [2021-06-05 16:53:46,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95405565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:46,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459888390] [2021-06-05 16:53:46,615 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 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 16:53:46,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:53:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:46,727 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 16:53:46,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459888390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:46,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:46,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:53:46,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662733811] [2021-06-05 16:53:46,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:46,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:46,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:46,727 INFO L87 Difference]: Start difference. First operand 11246 states and 42496 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:47,402 INFO L93 Difference]: Finished difference Result 17570 states and 63375 transitions. [2021-06-05 16:53:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:53:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:47,435 INFO L225 Difference]: With dead ends: 17570 [2021-06-05 16:53:47,435 INFO L226 Difference]: Without dead ends: 17557 [2021-06-05 16:53:47,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:53:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17557 states. [2021-06-05 16:53:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17557 to 12557. [2021-06-05 16:53:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12557 states, 12556 states have (on average 3.8467664861420836) internal successors, (48300), 12556 states have internal predecessors, (48300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 48300 transitions. [2021-06-05 16:53:47,743 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 48300 transitions. Word has length 28 [2021-06-05 16:53:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:47,744 INFO L482 AbstractCegarLoop]: Abstraction has 12557 states and 48300 transitions. [2021-06-05 16:53:47,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 48300 transitions. [2021-06-05 16:53:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:47,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:47,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:47,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:47,962 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1057933143, now seen corresponding path program 108 times [2021-06-05 16:53:47,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:47,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447803146] [2021-06-05 16:53:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:47,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:47,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447803146] [2021-06-05 16:53:47,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447803146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:47,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136265005] [2021-06-05 16:53:47,990 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 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 16:53:48,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:53:48,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:48,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:48,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:48,102 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 16:53:48,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136265005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:48,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:48,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:53:48,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205483518] [2021-06-05 16:53:48,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:48,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:48,103 INFO L87 Difference]: Start difference. First operand 12557 states and 48300 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:48,865 INFO L93 Difference]: Finished difference Result 17668 states and 63624 transitions. [2021-06-05 16:53:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:53:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:48,898 INFO L225 Difference]: With dead ends: 17668 [2021-06-05 16:53:48,898 INFO L226 Difference]: Without dead ends: 17662 [2021-06-05 16:53:48,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:53:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17662 states. [2021-06-05 16:53:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17662 to 12530. [2021-06-05 16:53:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 3.845957378880996) internal successors, (48186), 12529 states have internal predecessors, (48186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 48186 transitions. [2021-06-05 16:53:49,176 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 48186 transitions. Word has length 28 [2021-06-05 16:53:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:49,176 INFO L482 AbstractCegarLoop]: Abstraction has 12530 states and 48186 transitions. [2021-06-05 16:53:49,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 48186 transitions. [2021-06-05 16:53:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:49,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:49,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:49,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:49,394 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash -757405679, now seen corresponding path program 109 times [2021-06-05 16:53:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:49,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084694721] [2021-06-05 16:53:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:49,425 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 16:53:49,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:49,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084694721] [2021-06-05 16:53:49,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084694721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:49,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115302193] [2021-06-05 16:53:49,426 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 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 16:53:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:49,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:49,546 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 16:53:49,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115302193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:49,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:49,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:53:49,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644691172] [2021-06-05 16:53:49,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:49,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:49,547 INFO L87 Difference]: Start difference. First operand 12530 states and 48186 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:50,194 INFO L93 Difference]: Finished difference Result 19731 states and 71148 transitions. [2021-06-05 16:53:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:53:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:50,235 INFO L225 Difference]: With dead ends: 19731 [2021-06-05 16:53:50,235 INFO L226 Difference]: Without dead ends: 19718 [2021-06-05 16:53:50,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:53:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19718 states. [2021-06-05 16:53:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19718 to 12590. [2021-06-05 16:53:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12590 states, 12589 states have (on average 3.850663277464453) internal successors, (48476), 12589 states have internal predecessors, (48476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 48476 transitions. [2021-06-05 16:53:50,641 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 48476 transitions. Word has length 28 [2021-06-05 16:53:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:50,641 INFO L482 AbstractCegarLoop]: Abstraction has 12590 states and 48476 transitions. [2021-06-05 16:53:50,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 48476 transitions. [2021-06-05 16:53:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:50,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:50,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:50,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3565,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:50,861 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1440150009, now seen corresponding path program 110 times [2021-06-05 16:53:50,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:50,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971420981] [2021-06-05 16:53:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:50,888 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 16:53:50,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:50,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971420981] [2021-06-05 16:53:50,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971420981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:50,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028112268] [2021-06-05 16:53:50,888 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 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 16:53:50,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:50,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:50,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:50,991 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 16:53:50,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028112268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:50,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:50,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:53:50,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444122545] [2021-06-05 16:53:50,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:50,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:50,992 INFO L87 Difference]: Start difference. First operand 12590 states and 48476 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:51,676 INFO L93 Difference]: Finished difference Result 20868 states and 74696 transitions. [2021-06-05 16:53:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:53:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:51,714 INFO L225 Difference]: With dead ends: 20868 [2021-06-05 16:53:51,714 INFO L226 Difference]: Without dead ends: 20868 [2021-06-05 16:53:51,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:53:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2021-06-05 16:53:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 12606. [2021-06-05 16:53:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12606 states, 12605 states have (on average 3.8476001586671957) internal successors, (48499), 12605 states have internal predecessors, (48499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12606 states to 12606 states and 48499 transitions. [2021-06-05 16:53:52,020 INFO L78 Accepts]: Start accepts. Automaton has 12606 states and 48499 transitions. Word has length 28 [2021-06-05 16:53:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:52,020 INFO L482 AbstractCegarLoop]: Abstraction has 12606 states and 48499 transitions. [2021-06-05 16:53:52,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12606 states and 48499 transitions. [2021-06-05 16:53:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:52,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:52,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:52,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3566,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:52,240 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash -373053407, now seen corresponding path program 78 times [2021-06-05 16:53:52,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:52,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438749349] [2021-06-05 16:53:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:52,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:52,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438749349] [2021-06-05 16:53:52,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438749349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:52,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409954467] [2021-06-05 16:53:52,300 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 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 16:53:52,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:53:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:52,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409954467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:52,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:52,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:53:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144504566] [2021-06-05 16:53:52,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:52,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:52,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:52,424 INFO L87 Difference]: Start difference. First operand 12606 states and 48499 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:53,362 INFO L93 Difference]: Finished difference Result 21980 states and 80698 transitions. [2021-06-05 16:53:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:53:53,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:53,402 INFO L225 Difference]: With dead ends: 21980 [2021-06-05 16:53:53,402 INFO L226 Difference]: Without dead ends: 21976 [2021-06-05 16:53:53,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 551.3ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:53:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-05 16:53:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 12860. [2021-06-05 16:53:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12860 states, 12859 states have (on average 3.837001322031262) internal successors, (49340), 12859 states have internal predecessors, (49340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12860 states to 12860 states and 49340 transitions. [2021-06-05 16:53:53,820 INFO L78 Accepts]: Start accepts. Automaton has 12860 states and 49340 transitions. Word has length 28 [2021-06-05 16:53:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:53,820 INFO L482 AbstractCegarLoop]: Abstraction has 12860 states and 49340 transitions. [2021-06-05 16:53:53,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 12860 states and 49340 transitions. [2021-06-05 16:53:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:53,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:53,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:54,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:54,040 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash -498610355, now seen corresponding path program 111 times [2021-06-05 16:53:54,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:54,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501115226] [2021-06-05 16:53:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:54,072 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 16:53:54,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:54,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501115226] [2021-06-05 16:53:54,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501115226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:54,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374025607] [2021-06-05 16:53:54,072 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 16:53:54,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:53:54,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:54,169 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 16:53:54,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374025607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:54,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:54,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:53:54,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535021964] [2021-06-05 16:53:54,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:54,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:54,170 INFO L87 Difference]: Start difference. First operand 12860 states and 49340 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:54,803 INFO L93 Difference]: Finished difference Result 18670 states and 68341 transitions. [2021-06-05 16:53:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:53:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:54,839 INFO L225 Difference]: With dead ends: 18670 [2021-06-05 16:53:54,839 INFO L226 Difference]: Without dead ends: 18647 [2021-06-05 16:53:54,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:53:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18647 states. [2021-06-05 16:53:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18647 to 13152. [2021-06-05 16:53:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13152 states, 13151 states have (on average 3.854307657212379) internal successors, (50688), 13151 states have internal predecessors, (50688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13152 states to 13152 states and 50688 transitions. [2021-06-05 16:53:55,111 INFO L78 Accepts]: Start accepts. Automaton has 13152 states and 50688 transitions. Word has length 28 [2021-06-05 16:53:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:55,111 INFO L482 AbstractCegarLoop]: Abstraction has 13152 states and 50688 transitions. [2021-06-05 16:53:55,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 13152 states and 50688 transitions. [2021-06-05 16:53:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:55,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:55,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:55,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-06-05 16:53:55,332 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:55,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1181354685, now seen corresponding path program 112 times [2021-06-05 16:53:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281371389] [2021-06-05 16:53:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:55,365 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 16:53:55,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281371389] [2021-06-05 16:53:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281371389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514415341] [2021-06-05 16:53:55,365 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 16:53:55,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:55,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:55,465 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 16:53:55,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514415341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:55,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:53:55,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520557121] [2021-06-05 16:53:55,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:55,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:55,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:55,466 INFO L87 Difference]: Start difference. First operand 13152 states and 50688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:56,196 INFO L93 Difference]: Finished difference Result 18648 states and 67382 transitions. [2021-06-05 16:53:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:53:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:56,232 INFO L225 Difference]: With dead ends: 18648 [2021-06-05 16:53:56,232 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 16:53:56,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:53:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 16:53:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 13107. [2021-06-05 16:53:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13107 states, 13106 states have (on average 3.8461010224324736) internal successors, (50407), 13106 states have internal predecessors, (50407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 50407 transitions. [2021-06-05 16:53:56,510 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 50407 transitions. Word has length 28 [2021-06-05 16:53:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:56,510 INFO L482 AbstractCegarLoop]: Abstraction has 13107 states and 50407 transitions. [2021-06-05 16:53:56,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 50407 transitions. [2021-06-05 16:53:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:56,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:56,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:56,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:56,733 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:56,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:56,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1501473149, now seen corresponding path program 113 times [2021-06-05 16:53:56,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:56,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992901382] [2021-06-05 16:53:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:56,779 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 16:53:56,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:56,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992901382] [2021-06-05 16:53:56,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992901382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:56,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555116277] [2021-06-05 16:53:56,781 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 16:53:56,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:53:56,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:56,882 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 16:53:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555116277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:56,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:56,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:53:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028448407] [2021-06-05 16:53:56,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:53:56,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:56,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:53:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:53:56,884 INFO L87 Difference]: Start difference. First operand 13107 states and 50407 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:57,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:57,649 INFO L93 Difference]: Finished difference Result 19972 states and 72578 transitions. [2021-06-05 16:53:57,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:53:57,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:57,692 INFO L225 Difference]: With dead ends: 19972 [2021-06-05 16:53:57,692 INFO L226 Difference]: Without dead ends: 19972 [2021-06-05 16:53:57,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:53:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19972 states. [2021-06-05 16:53:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19972 to 13820. [2021-06-05 16:53:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13820 states, 13819 states have (on average 3.832259931977712) internal successors, (52958), 13819 states have internal predecessors, (52958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13820 states to 13820 states and 52958 transitions. [2021-06-05 16:53:58,044 INFO L78 Accepts]: Start accepts. Automaton has 13820 states and 52958 transitions. Word has length 28 [2021-06-05 16:53:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:58,045 INFO L482 AbstractCegarLoop]: Abstraction has 13820 states and 52958 transitions. [2021-06-05 16:53:58,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 13820 states and 52958 transitions. [2021-06-05 16:53:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:58,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:58,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:58,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3570,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:58,266 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash -612070185, now seen corresponding path program 114 times [2021-06-05 16:53:58,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:58,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256538071] [2021-06-05 16:53:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:58,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256538071] [2021-06-05 16:53:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256538071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15325738] [2021-06-05 16:53:58,298 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 16:53:58,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:53:58,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:53:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:58,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15325738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:58,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:58,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:53:58,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614631721] [2021-06-05 16:53:58,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:58,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:58,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:58,411 INFO L87 Difference]: Start difference. First operand 13820 states and 52958 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:59,249 INFO L93 Difference]: Finished difference Result 22381 states and 80178 transitions. [2021-06-05 16:53:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:53:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:59,292 INFO L225 Difference]: With dead ends: 22381 [2021-06-05 16:53:59,292 INFO L226 Difference]: Without dead ends: 22381 [2021-06-05 16:53:59,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:53:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22381 states. [2021-06-05 16:53:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22381 to 14048. [2021-06-05 16:53:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 14047 states have (on average 3.843881255784153) internal successors, (53995), 14047 states have internal predecessors, (53995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 53995 transitions. [2021-06-05 16:53:59,611 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 53995 transitions. Word has length 28 [2021-06-05 16:53:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:59,611 INFO L482 AbstractCegarLoop]: Abstraction has 14048 states and 53995 transitions. [2021-06-05 16:53:59,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 53995 transitions. [2021-06-05 16:53:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:59,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:59,632 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:59,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-06-05 16:53:59,832 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1934603223, now seen corresponding path program 79 times [2021-06-05 16:53:59,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:59,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930017507] [2021-06-05 16:53:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:59,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:59,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930017507] [2021-06-05 16:53:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930017507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:59,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992779250] [2021-06-05 16:53:59,867 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 16:53:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:59,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:59,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992779250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:59,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:59,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:53:59,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680528424] [2021-06-05 16:53:59,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:59,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:59,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:59,994 INFO L87 Difference]: Start difference. First operand 14048 states and 53995 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:01,557 INFO L93 Difference]: Finished difference Result 39001 states and 140171 transitions. [2021-06-05 16:54:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:54:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:01,639 INFO L225 Difference]: With dead ends: 39001 [2021-06-05 16:54:01,640 INFO L226 Difference]: Without dead ends: 39001 [2021-06-05 16:54:01,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 900.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:54:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39001 states. [2021-06-05 16:54:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39001 to 15286. [2021-06-05 16:54:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15286 states, 15285 states have (on average 3.890677134445535) internal successors, (59469), 15285 states have internal predecessors, (59469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15286 states to 15286 states and 59469 transitions. [2021-06-05 16:54:02,149 INFO L78 Accepts]: Start accepts. Automaton has 15286 states and 59469 transitions. Word has length 28 [2021-06-05 16:54:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:02,149 INFO L482 AbstractCegarLoop]: Abstraction has 15286 states and 59469 transitions. [2021-06-05 16:54:02,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15286 states and 59469 transitions. [2021-06-05 16:54:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:02,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:02,172 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:02,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-06-05 16:54:02,372 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -405698579, now seen corresponding path program 80 times [2021-06-05 16:54:02,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:02,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010246774] [2021-06-05 16:54:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:02,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:02,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010246774] [2021-06-05 16:54:02,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010246774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:02,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188199324] [2021-06-05 16:54:02,408 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 16:54:02,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:02,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:02,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188199324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:02,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:02,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:54:02,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495625009] [2021-06-05 16:54:02,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:54:02,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:02,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:54:02,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:54:02,535 INFO L87 Difference]: Start difference. First operand 15286 states and 59469 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:04,019 INFO L93 Difference]: Finished difference Result 38023 states and 137597 transitions. [2021-06-05 16:54:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:54:04,019 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:04,115 INFO L225 Difference]: With dead ends: 38023 [2021-06-05 16:54:04,115 INFO L226 Difference]: Without dead ends: 38023 [2021-06-05 16:54:04,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 908.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:54:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38023 states. [2021-06-05 16:54:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38023 to 15260. [2021-06-05 16:54:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15260 states, 15259 states have (on average 3.8870830329641524) internal successors, (59313), 15259 states have internal predecessors, (59313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15260 states to 15260 states and 59313 transitions. [2021-06-05 16:54:04,789 INFO L78 Accepts]: Start accepts. Automaton has 15260 states and 59313 transitions. Word has length 28 [2021-06-05 16:54:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:04,789 INFO L482 AbstractCegarLoop]: Abstraction has 15260 states and 59313 transitions. [2021-06-05 16:54:04,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15260 states and 59313 transitions. [2021-06-05 16:54:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:04,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:04,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:05,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3573 [2021-06-05 16:54:05,012 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1649877491, now seen corresponding path program 115 times [2021-06-05 16:54:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:05,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703714798] [2021-06-05 16:54:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:05,071 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 16:54:05,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:05,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703714798] [2021-06-05 16:54:05,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703714798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:05,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65681501] [2021-06-05 16:54:05,072 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 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 16:54:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:05,150 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 16:54:05,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65681501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:05,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:05,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:54:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798791964] [2021-06-05 16:54:05,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:54:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:05,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:54:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:54:05,151 INFO L87 Difference]: Start difference. First operand 15260 states and 59313 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:05,443 INFO L93 Difference]: Finished difference Result 23613 states and 90414 transitions. [2021-06-05 16:54:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:54:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:05,494 INFO L225 Difference]: With dead ends: 23613 [2021-06-05 16:54:05,495 INFO L226 Difference]: Without dead ends: 23563 [2021-06-05 16:54:05,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:54:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23563 states. [2021-06-05 16:54:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23563 to 20372. [2021-06-05 16:54:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20372 states, 20371 states have (on average 3.902803004270777) internal successors, (79504), 20371 states have internal predecessors, (79504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20372 states to 20372 states and 79504 transitions. [2021-06-05 16:54:05,886 INFO L78 Accepts]: Start accepts. Automaton has 20372 states and 79504 transitions. Word has length 28 [2021-06-05 16:54:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:05,886 INFO L482 AbstractCegarLoop]: Abstraction has 20372 states and 79504 transitions. [2021-06-05 16:54:05,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20372 states and 79504 transitions. [2021-06-05 16:54:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:05,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:05,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:06,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:06,116 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:06,117 INFO L82 PathProgramCache]: Analyzing trace with hash 260189251, now seen corresponding path program 116 times [2021-06-05 16:54:06,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:06,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546393225] [2021-06-05 16:54:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:06,146 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 16:54:06,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:06,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546393225] [2021-06-05 16:54:06,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546393225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:06,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805478288] [2021-06-05 16:54:06,146 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 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 16:54:06,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:06,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:06,229 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 16:54:06,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805478288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:06,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:06,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:54:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195058980] [2021-06-05 16:54:06,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:06,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:06,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:06,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:06,230 INFO L87 Difference]: Start difference. First operand 20372 states and 79504 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:06,459 INFO L93 Difference]: Finished difference Result 23123 states and 87862 transitions. [2021-06-05 16:54:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:54:06,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:06,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:06,503 INFO L225 Difference]: With dead ends: 23123 [2021-06-05 16:54:06,504 INFO L226 Difference]: Without dead ends: 23123 [2021-06-05 16:54:06,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:54:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-05 16:54:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 19875. [2021-06-05 16:54:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19874 states have (on average 3.891114018315387) internal successors, (77332), 19874 states have internal predecessors, (77332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 77332 transitions. [2021-06-05 16:54:06,901 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 77332 transitions. Word has length 28 [2021-06-05 16:54:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:06,901 INFO L482 AbstractCegarLoop]: Abstraction has 19875 states and 77332 transitions. [2021-06-05 16:54:06,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 77332 transitions. [2021-06-05 16:54:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:06,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:06,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:07,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3575 [2021-06-05 16:54:07,141 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash -691492187, now seen corresponding path program 117 times [2021-06-05 16:54:07,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:07,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120735091] [2021-06-05 16:54:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:07,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:07,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120735091] [2021-06-05 16:54:07,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120735091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:07,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983865500] [2021-06-05 16:54:07,185 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 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 16:54:07,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:54:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:07,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983865500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:07,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:07,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:54:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126732637] [2021-06-05 16:54:07,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:54:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:54:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:54:07,365 INFO L87 Difference]: Start difference. First operand 19875 states and 77332 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:08,443 INFO L93 Difference]: Finished difference Result 31643 states and 117215 transitions. [2021-06-05 16:54:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:54:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:08,535 INFO L225 Difference]: With dead ends: 31643 [2021-06-05 16:54:08,535 INFO L226 Difference]: Without dead ends: 31643 [2021-06-05 16:54:08,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:54:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31643 states. [2021-06-05 16:54:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31643 to 19937. [2021-06-05 16:54:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19937 states, 19936 states have (on average 3.889446227929374) internal successors, (77540), 19936 states have internal predecessors, (77540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19937 states to 19937 states and 77540 transitions. [2021-06-05 16:54:09,022 INFO L78 Accepts]: Start accepts. Automaton has 19937 states and 77540 transitions. Word has length 28 [2021-06-05 16:54:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:09,023 INFO L482 AbstractCegarLoop]: Abstraction has 19937 states and 77540 transitions. [2021-06-05 16:54:09,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19937 states and 77540 transitions. [2021-06-05 16:54:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:09,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:09,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:09,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3576,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:09,251 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:09,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1667811031, now seen corresponding path program 118 times [2021-06-05 16:54:09,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:09,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879747351] [2021-06-05 16:54:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879747351] [2021-06-05 16:54:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879747351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453023736] [2021-06-05 16:54:09,290 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 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 16:54:09,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:09,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:09,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:09,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453023736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:09,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:09,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:54:09,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723071300] [2021-06-05 16:54:09,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:54:09,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:54:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:54:09,410 INFO L87 Difference]: Start difference. First operand 19937 states and 77540 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:10,868 INFO L93 Difference]: Finished difference Result 40452 states and 148213 transitions. [2021-06-05 16:54:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:54:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:10,965 INFO L225 Difference]: With dead ends: 40452 [2021-06-05 16:54:10,965 INFO L226 Difference]: Without dead ends: 40452 [2021-06-05 16:54:10,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 888.1ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:54:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-06-05 16:54:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 19942. [2021-06-05 16:54:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19942 states, 19941 states have (on average 3.891530013539943) internal successors, (77601), 19941 states have internal predecessors, (77601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19942 states to 19942 states and 77601 transitions. [2021-06-05 16:54:11,747 INFO L78 Accepts]: Start accepts. Automaton has 19942 states and 77601 transitions. Word has length 28 [2021-06-05 16:54:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:11,747 INFO L482 AbstractCegarLoop]: Abstraction has 19942 states and 77601 transitions. [2021-06-05 16:54:11,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 19942 states and 77601 transitions. [2021-06-05 16:54:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:11,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:11,779 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:11,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:11,979 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash -138906387, now seen corresponding path program 119 times [2021-06-05 16:54:11,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:11,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441214563] [2021-06-05 16:54:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:12,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:12,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441214563] [2021-06-05 16:54:12,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441214563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:12,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482511541] [2021-06-05 16:54:12,017 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 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 16:54:12,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:54:12,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:12,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482511541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:12,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:12,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:54:12,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666301718] [2021-06-05 16:54:12,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:54:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:54:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:54:12,138 INFO L87 Difference]: Start difference. First operand 19942 states and 77601 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:13,615 INFO L93 Difference]: Finished difference Result 40013 states and 147353 transitions. [2021-06-05 16:54:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:54:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:13,700 INFO L225 Difference]: With dead ends: 40013 [2021-06-05 16:54:13,700 INFO L226 Difference]: Without dead ends: 40013 [2021-06-05 16:54:13,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 876.7ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:54:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40013 states. [2021-06-05 16:54:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40013 to 19730. [2021-06-05 16:54:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19730 states, 19729 states have (on average 3.8836230929089157) internal successors, (76620), 19729 states have internal predecessors, (76620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19730 states to 19730 states and 76620 transitions. [2021-06-05 16:54:14,247 INFO L78 Accepts]: Start accepts. Automaton has 19730 states and 76620 transitions. Word has length 28 [2021-06-05 16:54:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:14,248 INFO L482 AbstractCegarLoop]: Abstraction has 19730 states and 76620 transitions. [2021-06-05 16:54:14,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19730 states and 76620 transitions. [2021-06-05 16:54:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:14,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:14,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:14,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3578 [2021-06-05 16:54:14,476 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash -164720279, now seen corresponding path program 120 times [2021-06-05 16:54:14,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:14,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116911506] [2021-06-05 16:54:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:14,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:14,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116911506] [2021-06-05 16:54:14,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116911506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121306626] [2021-06-05 16:54:14,506 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 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 16:54:14,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:14,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:14,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:54:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:14,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121306626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:14,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:54:14,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573526384] [2021-06-05 16:54:14,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:14,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:14,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:14,590 INFO L87 Difference]: Start difference. First operand 19730 states and 76620 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:14,865 INFO L93 Difference]: Finished difference Result 29201 states and 109016 transitions. [2021-06-05 16:54:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:54:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:14,924 INFO L225 Difference]: With dead ends: 29201 [2021-06-05 16:54:14,924 INFO L226 Difference]: Without dead ends: 29184 [2021-06-05 16:54:14,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:54:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29184 states. [2021-06-05 16:54:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29184 to 19998. [2021-06-05 16:54:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19998 states, 19997 states have (on average 3.889183377506626) internal successors, (77772), 19997 states have internal predecessors, (77772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 77772 transitions. [2021-06-05 16:54:15,445 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 77772 transitions. Word has length 28 [2021-06-05 16:54:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:15,445 INFO L482 AbstractCegarLoop]: Abstraction has 19998 states and 77772 transitions. [2021-06-05 16:54:15,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 77772 transitions. [2021-06-05 16:54:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:15,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:15,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:15,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:15,676 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1307646319, now seen corresponding path program 121 times [2021-06-05 16:54:15,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:15,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829030336] [2021-06-05 16:54:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:15,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829030336] [2021-06-05 16:54:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829030336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:15,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223533730] [2021-06-05 16:54:15,705 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 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 16:54:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:54:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:15,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223533730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:15,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:15,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:54:15,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208951468] [2021-06-05 16:54:15,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:15,791 INFO L87 Difference]: Start difference. First operand 19998 states and 77772 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:16,066 INFO L93 Difference]: Finished difference Result 30984 states and 114572 transitions. [2021-06-05 16:54:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:54:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:16,136 INFO L225 Difference]: With dead ends: 30984 [2021-06-05 16:54:16,137 INFO L226 Difference]: Without dead ends: 30984 [2021-06-05 16:54:16,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:54:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30984 states. [2021-06-05 16:54:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30984 to 19667. [2021-06-05 16:54:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19667 states, 19666 states have (on average 3.8739957286687683) internal successors, (76186), 19666 states have internal predecessors, (76186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 76186 transitions. [2021-06-05 16:54:16,567 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 76186 transitions. Word has length 28 [2021-06-05 16:54:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:16,567 INFO L482 AbstractCegarLoop]: Abstraction has 19667 states and 76186 transitions. [2021-06-05 16:54:16,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 76186 transitions. [2021-06-05 16:54:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:16,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:16,596 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:16,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3580 [2021-06-05 16:54:16,796 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1640639411, now seen corresponding path program 122 times [2021-06-05 16:54:16,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:16,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553498481] [2021-06-05 16:54:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:16,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553498481] [2021-06-05 16:54:16,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553498481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971980511] [2021-06-05 16:54:16,848 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 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 16:54:16,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:16,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:16,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971980511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:16,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:16,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:54:16,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891845027] [2021-06-05 16:54:16,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:54:16,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:54:16,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:16,948 INFO L87 Difference]: Start difference. First operand 19667 states and 76186 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:17,712 INFO L93 Difference]: Finished difference Result 29160 states and 108410 transitions. [2021-06-05 16:54:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:54:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:17,778 INFO L225 Difference]: With dead ends: 29160 [2021-06-05 16:54:17,778 INFO L226 Difference]: Without dead ends: 29160 [2021-06-05 16:54:17,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:54:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-06-05 16:54:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 19711. [2021-06-05 16:54:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 3.8728564180618976) internal successors, (76334), 19710 states have internal predecessors, (76334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 76334 transitions. [2021-06-05 16:54:18,377 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 76334 transitions. Word has length 28 [2021-06-05 16:54:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:18,377 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 76334 transitions. [2021-06-05 16:54:18,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 76334 transitions. [2021-06-05 16:54:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:18,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:18,410 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:18,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3581,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:18,610 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:18,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1869413791, now seen corresponding path program 123 times [2021-06-05 16:54:18,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:18,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872101481] [2021-06-05 16:54:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:18,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:18,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872101481] [2021-06-05 16:54:18,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872101481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:18,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989336800] [2021-06-05 16:54:18,656 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 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 16:54:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:54:18,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:18,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989336800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:18,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:18,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:54:18,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938171011] [2021-06-05 16:54:18,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:54:18,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:18,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:54:18,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:18,767 INFO L87 Difference]: Start difference. First operand 19711 states and 76334 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:19,844 INFO L93 Difference]: Finished difference Result 30658 states and 112697 transitions. [2021-06-05 16:54:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:54:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:19,914 INFO L225 Difference]: With dead ends: 30658 [2021-06-05 16:54:19,914 INFO L226 Difference]: Without dead ends: 30658 [2021-06-05 16:54:19,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:54:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30658 states. [2021-06-05 16:54:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30658 to 20243. [2021-06-05 16:54:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20243 states, 20242 states have (on average 3.8518921055231696) internal successors, (77970), 20242 states have internal predecessors, (77970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20243 states to 20243 states and 77970 transitions. [2021-06-05 16:54:20,429 INFO L78 Accepts]: Start accepts. Automaton has 20243 states and 77970 transitions. Word has length 28 [2021-06-05 16:54:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:20,429 INFO L482 AbstractCegarLoop]: Abstraction has 20243 states and 77970 transitions. [2021-06-05 16:54:20,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 20243 states and 77970 transitions. [2021-06-05 16:54:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:20,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:20,467 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:20,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 16:54:20,689 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash -923294047, now seen corresponding path program 124 times [2021-06-05 16:54:20,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:20,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517927421] [2021-06-05 16:54:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:20,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517927421] [2021-06-05 16:54:20,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517927421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912942846] [2021-06-05 16:54:20,727 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 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 16:54:20,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:20,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:20,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912942846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:20,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:20,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:54:20,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930549723] [2021-06-05 16:54:20,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:54:20,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:54:20,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:20,842 INFO L87 Difference]: Start difference. First operand 20243 states and 77970 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:21,831 INFO L93 Difference]: Finished difference Result 29767 states and 110352 transitions. [2021-06-05 16:54:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:54:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:21,901 INFO L225 Difference]: With dead ends: 29767 [2021-06-05 16:54:21,901 INFO L226 Difference]: Without dead ends: 29763 [2021-06-05 16:54:21,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:54:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29763 states. [2021-06-05 16:54:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29763 to 20135. [2021-06-05 16:54:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 3.854773020760902) internal successors, (77612), 20134 states have internal predecessors, (77612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 77612 transitions. [2021-06-05 16:54:22,553 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 77612 transitions. Word has length 28 [2021-06-05 16:54:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:22,554 INFO L482 AbstractCegarLoop]: Abstraction has 20135 states and 77612 transitions. [2021-06-05 16:54:22,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 77612 transitions. [2021-06-05 16:54:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:22,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:22,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:22,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3583,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:22,784 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:22,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1048850995, now seen corresponding path program 125 times [2021-06-05 16:54:22,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:22,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661581372] [2021-06-05 16:54:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:22,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:22,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661581372] [2021-06-05 16:54:22,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661581372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:22,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254064162] [2021-06-05 16:54:22,836 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 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 16:54:22,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:54:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:54:22,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254064162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:22,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:22,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:54:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899834624] [2021-06-05 16:54:22,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:54:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:54:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:54:22,916 INFO L87 Difference]: Start difference. First operand 20135 states and 77612 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:23,134 INFO L93 Difference]: Finished difference Result 25115 states and 93450 transitions. [2021-06-05 16:54:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:54:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:23,186 INFO L225 Difference]: With dead ends: 25115 [2021-06-05 16:54:23,186 INFO L226 Difference]: Without dead ends: 25115 [2021-06-05 16:54:23,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25115 states. [2021-06-05 16:54:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 20445. [2021-06-05 16:54:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20444 states have (on average 3.845871649383682) internal successors, (78625), 20444 states have internal predecessors, (78625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 78625 transitions. [2021-06-05 16:54:23,566 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 78625 transitions. Word has length 28 [2021-06-05 16:54:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:23,567 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 78625 transitions. [2021-06-05 16:54:23,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 78625 transitions. [2021-06-05 16:54:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:23,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:23,597 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:23,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-06-05 16:54:23,798 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash -118651251, now seen corresponding path program 126 times [2021-06-05 16:54:23,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:23,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190685852] [2021-06-05 16:54:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:23,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:23,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190685852] [2021-06-05 16:54:23,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190685852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:23,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173271001] [2021-06-05 16:54:23,835 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 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 16:54:23,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:23,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:23,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173271001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:23,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:23,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:54:23,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688935990] [2021-06-05 16:54:23,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:23,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:23,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:23,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:23,926 INFO L87 Difference]: Start difference. First operand 20445 states and 78625 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:24,736 INFO L93 Difference]: Finished difference Result 30869 states and 113082 transitions. [2021-06-05 16:54:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:54:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:24,804 INFO L225 Difference]: With dead ends: 30869 [2021-06-05 16:54:24,804 INFO L226 Difference]: Without dead ends: 30869 [2021-06-05 16:54:24,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:54:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30869 states. [2021-06-05 16:54:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30869 to 22051. [2021-06-05 16:54:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22051 states, 22050 states have (on average 3.8592743764172335) internal successors, (85097), 22050 states have internal predecessors, (85097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22051 states to 22051 states and 85097 transitions. [2021-06-05 16:54:25,387 INFO L78 Accepts]: Start accepts. Automaton has 22051 states and 85097 transitions. Word has length 28 [2021-06-05 16:54:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:25,387 INFO L482 AbstractCegarLoop]: Abstraction has 22051 states and 85097 transitions. [2021-06-05 16:54:25,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 22051 states and 85097 transitions. [2021-06-05 16:54:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:25,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:25,418 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:25,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:25,619 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:25,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1808445805, now seen corresponding path program 127 times [2021-06-05 16:54:25,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:25,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35014711] [2021-06-05 16:54:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:25,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35014711] [2021-06-05 16:54:25,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35014711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491252915] [2021-06-05 16:54:25,656 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 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 16:54:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:25,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:54:25,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491252915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:25,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:25,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:54:25,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578413286] [2021-06-05 16:54:25,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:25,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:25,745 INFO L87 Difference]: Start difference. First operand 22051 states and 85097 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:26,442 INFO L93 Difference]: Finished difference Result 29083 states and 108458 transitions. [2021-06-05 16:54:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:54:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:26,508 INFO L225 Difference]: With dead ends: 29083 [2021-06-05 16:54:26,508 INFO L226 Difference]: Without dead ends: 29071 [2021-06-05 16:54:26,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:54:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-06-05 16:54:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 22169. [2021-06-05 16:54:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 3.854655359076146) internal successors, (85450), 22168 states have internal predecessors, (85450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 85450 transitions. [2021-06-05 16:54:27,123 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 85450 transitions. Word has length 28 [2021-06-05 16:54:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:27,123 INFO L482 AbstractCegarLoop]: Abstraction has 22169 states and 85450 transitions. [2021-06-05 16:54:27,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 85450 transitions. [2021-06-05 16:54:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:27,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:27,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:27,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:27,354 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:27,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1705760401, now seen corresponding path program 128 times [2021-06-05 16:54:27,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:27,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139193602] [2021-06-05 16:54:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:27,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:27,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139193602] [2021-06-05 16:54:27,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139193602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:27,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077238261] [2021-06-05 16:54:27,386 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 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 16:54:27,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:27,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:54:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077238261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:27,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:27,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:54:27,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182137436] [2021-06-05 16:54:27,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:54:27,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:27,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:54:27,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:54:27,470 INFO L87 Difference]: Start difference. First operand 22169 states and 85450 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:27,705 INFO L93 Difference]: Finished difference Result 25428 states and 96407 transitions. [2021-06-05 16:54:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:54:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:27,763 INFO L225 Difference]: With dead ends: 25428 [2021-06-05 16:54:27,763 INFO L226 Difference]: Without dead ends: 25428 [2021-06-05 16:54:27,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:54:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2021-06-05 16:54:28,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22972. [2021-06-05 16:54:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22972 states, 22971 states have (on average 3.84959296504288) internal successors, (88429), 22971 states have internal predecessors, (88429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 88429 transitions. [2021-06-05 16:54:28,195 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 88429 transitions. Word has length 28 [2021-06-05 16:54:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:28,195 INFO L482 AbstractCegarLoop]: Abstraction has 22972 states and 88429 transitions. [2021-06-05 16:54:28,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 88429 transitions. [2021-06-05 16:54:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:28,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:28,231 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:28,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3587,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:28,432 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:28,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2145545327, now seen corresponding path program 129 times [2021-06-05 16:54:28,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:28,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537024661] [2021-06-05 16:54:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:28,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537024661] [2021-06-05 16:54:28,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537024661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:28,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607023239] [2021-06-05 16:54:28,472 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 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 16:54:28,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:54:28,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:28,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:28,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607023239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:28,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:28,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:54:28,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280830534] [2021-06-05 16:54:28,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:28,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:28,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:28,562 INFO L87 Difference]: Start difference. First operand 22972 states and 88429 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:29,420 INFO L93 Difference]: Finished difference Result 30839 states and 113843 transitions. [2021-06-05 16:54:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:54:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:29,496 INFO L225 Difference]: With dead ends: 30839 [2021-06-05 16:54:29,497 INFO L226 Difference]: Without dead ends: 30839 [2021-06-05 16:54:29,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 421.1ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:54:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30839 states. [2021-06-05 16:54:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30839 to 24204. [2021-06-05 16:54:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24204 states, 24203 states have (on average 3.8153534685782753) internal successors, (92343), 24203 states have internal predecessors, (92343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 92343 transitions. [2021-06-05 16:54:30,142 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 92343 transitions. Word has length 28 [2021-06-05 16:54:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:30,142 INFO L482 AbstractCegarLoop]: Abstraction has 24204 states and 92343 transitions. [2021-06-05 16:54:30,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 92343 transitions. [2021-06-05 16:54:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:30,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:30,183 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:30,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:30,383 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash -414511489, now seen corresponding path program 130 times [2021-06-05 16:54:30,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:30,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828502699] [2021-06-05 16:54:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:30,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:30,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828502699] [2021-06-05 16:54:30,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828502699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:30,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290885640] [2021-06-05 16:54:30,418 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 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 16:54:30,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:30,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290885640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:30,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:30,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:54:30,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416933358] [2021-06-05 16:54:30,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:54:30,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:30,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:54:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:54:30,501 INFO L87 Difference]: Start difference. First operand 24204 states and 92343 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:31,089 INFO L93 Difference]: Finished difference Result 29939 states and 111457 transitions. [2021-06-05 16:54:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:54:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:31,157 INFO L225 Difference]: With dead ends: 29939 [2021-06-05 16:54:31,157 INFO L226 Difference]: Without dead ends: 29931 [2021-06-05 16:54:31,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:54:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-06-05 16:54:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 24026. [2021-06-05 16:54:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.821685744016649) internal successors, (91816), 24025 states have internal predecessors, (91816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 91816 transitions. [2021-06-05 16:54:31,667 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 91816 transitions. Word has length 28 [2021-06-05 16:54:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:31,667 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 91816 transitions. [2021-06-05 16:54:31,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 91816 transitions. [2021-06-05 16:54:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:31,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:31,702 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:31,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3589,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:31,902 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash 44544553, now seen corresponding path program 131 times [2021-06-05 16:54:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:31,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3177533] [2021-06-05 16:54:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:31,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3177533] [2021-06-05 16:54:31,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3177533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277192799] [2021-06-05 16:54:31,937 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 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 16:54:31,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:54:31,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:31,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:31,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:32,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277192799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:32,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:32,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:54:32,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322210102] [2021-06-05 16:54:32,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:54:32,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:32,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:54:32,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:54:32,026 INFO L87 Difference]: Start difference. First operand 24026 states and 91816 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:32,763 INFO L93 Difference]: Finished difference Result 31774 states and 117062 transitions. [2021-06-05 16:54:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:54:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:32,833 INFO L225 Difference]: With dead ends: 31774 [2021-06-05 16:54:32,833 INFO L226 Difference]: Without dead ends: 31774 [2021-06-05 16:54:32,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:54:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31774 states. [2021-06-05 16:54:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31774 to 25062. [2021-06-05 16:54:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25062 states, 25061 states have (on average 3.796416743146722) internal successors, (95142), 25061 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25062 states to 25062 states and 95142 transitions. [2021-06-05 16:54:33,388 INFO L78 Accepts]: Start accepts. Automaton has 25062 states and 95142 transitions. Word has length 28 [2021-06-05 16:54:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:33,388 INFO L482 AbstractCegarLoop]: Abstraction has 25062 states and 95142 transitions. [2021-06-05 16:54:33,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 25062 states and 95142 transitions. [2021-06-05 16:54:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:33,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:33,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:33,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 16:54:33,633 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1038478103, now seen corresponding path program 132 times [2021-06-05 16:54:33,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:33,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460068763] [2021-06-05 16:54:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:33,666 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 16:54:33,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:33,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460068763] [2021-06-05 16:54:33,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460068763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:33,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164020055] [2021-06-05 16:54:33,667 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 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 16:54:33,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:33,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:33,909 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 16:54:33,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164020055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:33,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:33,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:54:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633469502] [2021-06-05 16:54:33,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:33,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:33,910 INFO L87 Difference]: Start difference. First operand 25062 states and 95142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:34,339 INFO L93 Difference]: Finished difference Result 30731 states and 115778 transitions. [2021-06-05 16:54:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:54:34,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:34,409 INFO L225 Difference]: With dead ends: 30731 [2021-06-05 16:54:34,409 INFO L226 Difference]: Without dead ends: 30718 [2021-06-05 16:54:34,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:54:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30718 states. [2021-06-05 16:54:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30718 to 29185. [2021-06-05 16:54:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29185 states, 29184 states have (on average 3.8150356359649122) internal successors, (111338), 29184 states have internal predecessors, (111338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29185 states to 29185 states and 111338 transitions. [2021-06-05 16:54:34,989 INFO L78 Accepts]: Start accepts. Automaton has 29185 states and 111338 transitions. Word has length 28 [2021-06-05 16:54:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:34,989 INFO L482 AbstractCegarLoop]: Abstraction has 29185 states and 111338 transitions. [2021-06-05 16:54:34,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 29185 states and 111338 transitions. [2021-06-05 16:54:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:35,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:35,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:35,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3591,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:35,236 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash 432600015, now seen corresponding path program 133 times [2021-06-05 16:54:35,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:35,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209823648] [2021-06-05 16:54:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:35,269 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 16:54:35,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:35,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209823648] [2021-06-05 16:54:35,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209823648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:35,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878456933] [2021-06-05 16:54:35,270 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 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 16:54:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:35,349 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 16:54:35,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878456933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:35,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:35,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:54:35,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737596915] [2021-06-05 16:54:35,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:35,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:35,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:35,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:35,350 INFO L87 Difference]: Start difference. First operand 29185 states and 111338 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:35,706 INFO L93 Difference]: Finished difference Result 32194 states and 120690 transitions. [2021-06-05 16:54:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:54:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:35,932 INFO L225 Difference]: With dead ends: 32194 [2021-06-05 16:54:35,932 INFO L226 Difference]: Without dead ends: 32194 [2021-06-05 16:54:35,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:54:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32194 states. [2021-06-05 16:54:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32194 to 28930. [2021-06-05 16:54:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28930 states, 28929 states have (on average 3.8113657575443325) internal successors, (110259), 28929 states have internal predecessors, (110259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28930 states to 28930 states and 110259 transitions. [2021-06-05 16:54:36,738 INFO L78 Accepts]: Start accepts. Automaton has 28930 states and 110259 transitions. Word has length 28 [2021-06-05 16:54:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:36,738 INFO L482 AbstractCegarLoop]: Abstraction has 28930 states and 110259 transitions. [2021-06-05 16:54:36,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28930 states and 110259 transitions. [2021-06-05 16:54:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:36,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:36,781 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:36,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3592 [2021-06-05 16:54:36,981 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:36,982 INFO L82 PathProgramCache]: Analyzing trace with hash 990664297, now seen corresponding path program 134 times [2021-06-05 16:54:36,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:36,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852113649] [2021-06-05 16:54:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:37,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:37,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852113649] [2021-06-05 16:54:37,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852113649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:37,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570443788] [2021-06-05 16:54:37,014 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 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 16:54:37,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:37,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570443788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:37,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:37,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:54:37,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778999256] [2021-06-05 16:54:37,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:54:37,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:54:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:54:37,211 INFO L87 Difference]: Start difference. First operand 28930 states and 110259 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:37,875 INFO L93 Difference]: Finished difference Result 35356 states and 131587 transitions. [2021-06-05 16:54:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:54:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:37,963 INFO L225 Difference]: With dead ends: 35356 [2021-06-05 16:54:37,964 INFO L226 Difference]: Without dead ends: 35348 [2021-06-05 16:54:37,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:54:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35348 states. [2021-06-05 16:54:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35348 to 28896. [2021-06-05 16:54:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28896 states, 28895 states have (on average 3.8118013497144836) internal successors, (110142), 28895 states have internal predecessors, (110142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28896 states to 28896 states and 110142 transitions. [2021-06-05 16:54:38,888 INFO L78 Accepts]: Start accepts. Automaton has 28896 states and 110142 transitions. Word has length 28 [2021-06-05 16:54:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:38,888 INFO L482 AbstractCegarLoop]: Abstraction has 28896 states and 110142 transitions. [2021-06-05 16:54:38,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 28896 states and 110142 transitions. [2021-06-05 16:54:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:38,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:38,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:39,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3593,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:39,138 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:39,138 INFO L82 PathProgramCache]: Analyzing trace with hash -896097405, now seen corresponding path program 135 times [2021-06-05 16:54:39,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:39,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417435616] [2021-06-05 16:54:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:39,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:39,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417435616] [2021-06-05 16:54:39,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417435616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:39,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158412899] [2021-06-05 16:54:39,172 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 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 16:54:39,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:54:39,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:39,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158412899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:39,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:39,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:54:39,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341310624] [2021-06-05 16:54:39,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:54:39,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:39,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:54:39,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:54:39,261 INFO L87 Difference]: Start difference. First operand 28896 states and 110142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:39,823 INFO L93 Difference]: Finished difference Result 31746 states and 119616 transitions. [2021-06-05 16:54:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:54:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:39,903 INFO L225 Difference]: With dead ends: 31746 [2021-06-05 16:54:39,903 INFO L226 Difference]: Without dead ends: 31746 [2021-06-05 16:54:39,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:54:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31746 states. [2021-06-05 16:54:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31746 to 29428. [2021-06-05 16:54:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29428 states, 29427 states have (on average 3.81031025928569) internal successors, (112126), 29427 states have internal predecessors, (112126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29428 states to 29428 states and 112126 transitions. [2021-06-05 16:54:40,723 INFO L78 Accepts]: Start accepts. Automaton has 29428 states and 112126 transitions. Word has length 28 [2021-06-05 16:54:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:40,723 INFO L482 AbstractCegarLoop]: Abstraction has 29428 states and 112126 transitions. [2021-06-05 16:54:40,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 29428 states and 112126 transitions. [2021-06-05 16:54:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:40,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:40,768 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:40,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3594 [2021-06-05 16:54:40,969 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 68962157, now seen corresponding path program 136 times [2021-06-05 16:54:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:40,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508620788] [2021-06-05 16:54:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:41,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508620788] [2021-06-05 16:54:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508620788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985702026] [2021-06-05 16:54:41,003 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 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 16:54:41,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:41,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:41,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:54:41,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985702026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:41,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:41,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:54:41,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903291207] [2021-06-05 16:54:41,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:54:41,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:54:41,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:54:41,085 INFO L87 Difference]: Start difference. First operand 29428 states and 112126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:41,482 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 16:54:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:41,828 INFO L93 Difference]: Finished difference Result 36274 states and 134973 transitions. [2021-06-05 16:54:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:54:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:41,904 INFO L225 Difference]: With dead ends: 36274 [2021-06-05 16:54:41,904 INFO L226 Difference]: Without dead ends: 36250 [2021-06-05 16:54:41,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:54:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36250 states. [2021-06-05 16:54:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36250 to 29600. [2021-06-05 16:54:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29600 states, 29599 states have (on average 3.8062096692455825) internal successors, (112660), 29599 states have internal predecessors, (112660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29600 states to 29600 states and 112660 transitions. [2021-06-05 16:54:42,729 INFO L78 Accepts]: Start accepts. Automaton has 29600 states and 112660 transitions. Word has length 28 [2021-06-05 16:54:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:42,729 INFO L482 AbstractCegarLoop]: Abstraction has 29600 states and 112660 transitions. [2021-06-05 16:54:42,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 29600 states and 112660 transitions. [2021-06-05 16:54:42,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:42,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:42,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:42,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 16:54:42,981 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:42,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:42,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1253949625, now seen corresponding path program 137 times [2021-06-05 16:54:42,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:42,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696595888] [2021-06-05 16:54:42,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:43,024 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 16:54:43,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:43,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696595888] [2021-06-05 16:54:43,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696595888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:43,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989657829] [2021-06-05 16:54:43,025 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 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 16:54:43,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:43,111 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 16:54:43,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989657829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:43,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:43,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 16:54:43,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414049398] [2021-06-05 16:54:43,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:54:43,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:54:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:54:43,113 INFO L87 Difference]: Start difference. First operand 29600 states and 112660 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:43,876 INFO L93 Difference]: Finished difference Result 32160 states and 121084 transitions. [2021-06-05 16:54:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:43,965 INFO L225 Difference]: With dead ends: 32160 [2021-06-05 16:54:43,965 INFO L226 Difference]: Without dead ends: 32160 [2021-06-05 16:54:43,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:54:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32160 states. [2021-06-05 16:54:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32160 to 29526. [2021-06-05 16:54:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29526 states, 29525 states have (on average 3.807078746824725) internal successors, (112404), 29525 states have internal predecessors, (112404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29526 states to 29526 states and 112404 transitions. [2021-06-05 16:54:44,669 INFO L78 Accepts]: Start accepts. Automaton has 29526 states and 112404 transitions. Word has length 28 [2021-06-05 16:54:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:44,669 INFO L482 AbstractCegarLoop]: Abstraction has 29526 states and 112404 transitions. [2021-06-05 16:54:44,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 29526 states and 112404 transitions. [2021-06-05 16:54:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:44,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:44,716 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:44,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:44,916 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash -719397267, now seen corresponding path program 138 times [2021-06-05 16:54:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014793306] [2021-06-05 16:54:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:44,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:44,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014793306] [2021-06-05 16:54:44,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014793306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:44,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891443674] [2021-06-05 16:54:44,957 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 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 16:54:44,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:54:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:44,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:45,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891443674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:45,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:45,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:54:45,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784245042] [2021-06-05 16:54:45,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:45,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:45,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:45,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:45,041 INFO L87 Difference]: Start difference. First operand 29526 states and 112404 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:45,879 INFO L93 Difference]: Finished difference Result 36197 states and 134714 transitions. [2021-06-05 16:54:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:54:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:45,959 INFO L225 Difference]: With dead ends: 36197 [2021-06-05 16:54:45,959 INFO L226 Difference]: Without dead ends: 36157 [2021-06-05 16:54:45,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:54:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36157 states. [2021-06-05 16:54:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36157 to 29682. [2021-06-05 16:54:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29682 states, 29681 states have (on average 3.8031737475152454) internal successors, (112882), 29681 states have internal predecessors, (112882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29682 states to 29682 states and 112882 transitions. [2021-06-05 16:54:46,787 INFO L78 Accepts]: Start accepts. Automaton has 29682 states and 112882 transitions. Word has length 28 [2021-06-05 16:54:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:46,787 INFO L482 AbstractCegarLoop]: Abstraction has 29682 states and 112882 transitions. [2021-06-05 16:54:46,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 29682 states and 112882 transitions. [2021-06-05 16:54:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:46,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:46,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:47,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3597 [2021-06-05 16:54:47,040 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1643440553, now seen corresponding path program 139 times [2021-06-05 16:54:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:47,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050235530] [2021-06-05 16:54:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050235530] [2021-06-05 16:54:47,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050235530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991755315] [2021-06-05 16:54:47,078 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 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 16:54:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991755315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:47,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:47,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:54:47,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869056467] [2021-06-05 16:54:47,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:54:47,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:54:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:54:47,219 INFO L87 Difference]: Start difference. First operand 29682 states and 112882 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:48,032 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 16:54:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:48,734 INFO L93 Difference]: Finished difference Result 67954 states and 250170 transitions. [2021-06-05 16:54:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:54:48,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:48,906 INFO L225 Difference]: With dead ends: 67954 [2021-06-05 16:54:48,907 INFO L226 Difference]: Without dead ends: 67954 [2021-06-05 16:54:48,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:54:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67954 states. [2021-06-05 16:54:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67954 to 37388. [2021-06-05 16:54:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37388 states, 37387 states have (on average 3.884772781983042) internal successors, (145240), 37387 states have internal predecessors, (145240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37388 states to 37388 states and 145240 transitions. [2021-06-05 16:54:50,298 INFO L78 Accepts]: Start accepts. Automaton has 37388 states and 145240 transitions. Word has length 28 [2021-06-05 16:54:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:50,298 INFO L482 AbstractCegarLoop]: Abstraction has 37388 states and 145240 transitions. [2021-06-05 16:54:50,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 37388 states and 145240 transitions. [2021-06-05 16:54:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:50,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:50,356 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:50,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:50,557 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1122622099, now seen corresponding path program 140 times [2021-06-05 16:54:50,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:50,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581940997] [2021-06-05 16:54:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:50,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581940997] [2021-06-05 16:54:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581940997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833028033] [2021-06-05 16:54:50,590 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 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 16:54:50,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:50,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:50,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833028033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:50,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:50,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:54:50,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509269418] [2021-06-05 16:54:50,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:54:50,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:50,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:54:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:54:50,718 INFO L87 Difference]: Start difference. First operand 37388 states and 145240 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:51,358 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 16:54:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:52,372 INFO L93 Difference]: Finished difference Result 67327 states and 248511 transitions. [2021-06-05 16:54:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:54:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:52,578 INFO L225 Difference]: With dead ends: 67327 [2021-06-05 16:54:52,578 INFO L226 Difference]: Without dead ends: 67327 [2021-06-05 16:54:52,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:54:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67327 states. [2021-06-05 16:54:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67327 to 37385. [2021-06-05 16:54:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37384 states have (on average 3.8847100363791998) internal successors, (145226), 37384 states have internal predecessors, (145226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 145226 transitions. [2021-06-05 16:54:54,005 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 145226 transitions. Word has length 28 [2021-06-05 16:54:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:54,005 INFO L482 AbstractCegarLoop]: Abstraction has 37385 states and 145226 transitions. [2021-06-05 16:54:54,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 145226 transitions. [2021-06-05 16:54:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:54,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:54,063 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:54,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:54,264 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1038046775, now seen corresponding path program 141 times [2021-06-05 16:54:54,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:54,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952258769] [2021-06-05 16:54:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:54,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:54,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952258769] [2021-06-05 16:54:54,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952258769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:54,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450433872] [2021-06-05 16:54:54,297 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 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 16:54:54,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:54:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:54,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450433872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:54,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:54,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:54:54,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105499995] [2021-06-05 16:54:54,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:54:54,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:54:54,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:54:54,418 INFO L87 Difference]: Start difference. First operand 37385 states and 145226 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:55,800 INFO L93 Difference]: Finished difference Result 62746 states and 233002 transitions. [2021-06-05 16:54:55,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:54:55,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:55,960 INFO L225 Difference]: With dead ends: 62746 [2021-06-05 16:54:55,961 INFO L226 Difference]: Without dead ends: 62746 [2021-06-05 16:54:55,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 592.8ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:54:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62746 states. [2021-06-05 16:54:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62746 to 37407. [2021-06-05 16:54:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8850184462385715) internal successors, (145323), 37406 states have internal predecessors, (145323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145323 transitions. [2021-06-05 16:54:57,412 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145323 transitions. Word has length 28 [2021-06-05 16:54:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:57,412 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145323 transitions. [2021-06-05 16:54:57,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145323 transitions. [2021-06-05 16:54:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:57,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:57,481 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forcibly destroying the process [2021-06-05 16:54:57,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:57,706 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2110363749, now seen corresponding path program 142 times [2021-06-05 16:54:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:57,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127194830] [2021-06-05 16:54:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] The stream was forcibly closed: stdIn [2021-06-05 16:54:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:57,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:57,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127194830] [2021-06-05 16:54:57,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127194830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:57,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614150668] [2021-06-05 16:54:57,754 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 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 16:54:57,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:54:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614150668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:57,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:57,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:54:57,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725046200] [2021-06-05 16:54:57,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:54:57,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:57,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:54:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:54:57,884 INFO L87 Difference]: Start difference. First operand 37407 states and 145323 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:58,965 INFO L93 Difference]: Finished difference Result 61875 states and 230752 transitions. [2021-06-05 16:54:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:54:58,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:59,126 INFO L225 Difference]: With dead ends: 61875 [2021-06-05 16:54:59,126 INFO L226 Difference]: Without dead ends: 61867 [2021-06-05 16:54:59,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:54:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61867 states. [2021-06-05 16:55:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61867 to 37407. [2021-06-05 16:55:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8848580441640377) internal successors, (145317), 37406 states have internal predecessors, (145317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145317 transitions. [2021-06-05 16:55:00,454 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145317 transitions. Word has length 28 [2021-06-05 16:55:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:00,454 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145317 transitions. [2021-06-05 16:55:00,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145317 transitions. [2021-06-05 16:55:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:00,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:00,511 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:00,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3601,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:00,711 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash 104546025, now seen corresponding path program 143 times [2021-06-05 16:55:00,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:00,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208412003] [2021-06-05 16:55:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:00,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208412003] [2021-06-05 16:55:00,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208412003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756563008] [2021-06-05 16:55:00,744 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 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 16:55:00,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:55:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:00,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756563008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:00,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:00,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:55:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332706062] [2021-06-05 16:55:00,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:00,871 INFO L87 Difference]: Start difference. First operand 37407 states and 145317 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:02,302 INFO L93 Difference]: Finished difference Result 61558 states and 229893 transitions. [2021-06-05 16:55:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:55:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:02,505 INFO L225 Difference]: With dead ends: 61558 [2021-06-05 16:55:02,505 INFO L226 Difference]: Without dead ends: 61558 [2021-06-05 16:55:02,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:55:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-06-05 16:55:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 37415. [2021-06-05 16:55:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.8849361201689208) internal successors, (145351), 37414 states have internal predecessors, (145351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145351 transitions. [2021-06-05 16:55:03,905 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145351 transitions. Word has length 28 [2021-06-05 16:55:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:03,905 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145351 transitions. [2021-06-05 16:55:03,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145351 transitions. [2021-06-05 16:55:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:03,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:03,963 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:04,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3602 [2021-06-05 16:55:04,163 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash -950831369, now seen corresponding path program 144 times [2021-06-05 16:55:04,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:04,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496535124] [2021-06-05 16:55:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:04,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:04,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496535124] [2021-06-05 16:55:04,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496535124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:04,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396089676] [2021-06-05 16:55:04,196 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 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 16:55:04,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:55:04,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:04,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:04,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396089676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:04,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:04,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:55:04,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603663875] [2021-06-05 16:55:04,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:04,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:04,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:04,319 INFO L87 Difference]: Start difference. First operand 37415 states and 145351 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:05,674 INFO L93 Difference]: Finished difference Result 61347 states and 229367 transitions. [2021-06-05 16:55:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:55:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:05,845 INFO L225 Difference]: With dead ends: 61347 [2021-06-05 16:55:05,845 INFO L226 Difference]: Without dead ends: 61339 [2021-06-05 16:55:05,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:55:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61339 states. [2021-06-05 16:55:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61339 to 37415. [2021-06-05 16:55:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.884882664243331) internal successors, (145349), 37414 states have internal predecessors, (145349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145349 transitions. [2021-06-05 16:55:07,103 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145349 transitions. Word has length 28 [2021-06-05 16:55:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:07,103 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145349 transitions. [2021-06-05 16:55:07,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145349 transitions. [2021-06-05 16:55:07,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:07,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:07,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:07,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:07,361 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash 401579921, now seen corresponding path program 145 times [2021-06-05 16:55:07,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:07,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480339921] [2021-06-05 16:55:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:07,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:07,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480339921] [2021-06-05 16:55:07,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480339921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899698979] [2021-06-05 16:55:07,396 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 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 16:55:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:07,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899698979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:07,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:55:07,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583287582] [2021-06-05 16:55:07,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:55:07,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:07,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:55:07,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:55:07,550 INFO L87 Difference]: Start difference. First operand 37415 states and 145349 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,873 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 16:55:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:09,080 INFO L93 Difference]: Finished difference Result 60787 states and 225952 transitions. [2021-06-05 16:55:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:55:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:09,272 INFO L225 Difference]: With dead ends: 60787 [2021-06-05 16:55:09,272 INFO L226 Difference]: Without dead ends: 60787 [2021-06-05 16:55:09,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 919.7ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:55:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60787 states. [2021-06-05 16:55:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60787 to 40214. [2021-06-05 16:55:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40214 states, 40213 states have (on average 3.8890159898540273) internal successors, (156389), 40213 states have internal predecessors, (156389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40214 states to 40214 states and 156389 transitions. [2021-06-05 16:55:10,881 INFO L78 Accepts]: Start accepts. Automaton has 40214 states and 156389 transitions. Word has length 28 [2021-06-05 16:55:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:10,882 INFO L482 AbstractCegarLoop]: Abstraction has 40214 states and 156389 transitions. [2021-06-05 16:55:10,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 40214 states and 156389 transitions. [2021-06-05 16:55:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:10,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:10,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:11,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3604 [2021-06-05 16:55:11,140 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1473896895, now seen corresponding path program 146 times [2021-06-05 16:55:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:11,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609019847] [2021-06-05 16:55:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:11,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609019847] [2021-06-05 16:55:11,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609019847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781075840] [2021-06-05 16:55:11,175 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 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 16:55:11,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:11,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:11,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:11,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781075840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:11,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:11,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:55:11,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110792077] [2021-06-05 16:55:11,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:55:11,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:11,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:55:11,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:55:11,302 INFO L87 Difference]: Start difference. First operand 40214 states and 156389 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:12,313 INFO L93 Difference]: Finished difference Result 60310 states and 224694 transitions. [2021-06-05 16:55:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:55:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:12,476 INFO L225 Difference]: With dead ends: 60310 [2021-06-05 16:55:12,476 INFO L226 Difference]: Without dead ends: 60302 [2021-06-05 16:55:12,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:55:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60302 states. [2021-06-05 16:55:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60302 to 39928. [2021-06-05 16:55:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39928 states, 39927 states have (on average 3.8946577503944697) internal successors, (155502), 39927 states have internal predecessors, (155502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39928 states to 39928 states and 155502 transitions. [2021-06-05 16:55:14,115 INFO L78 Accepts]: Start accepts. Automaton has 39928 states and 155502 transitions. Word has length 28 [2021-06-05 16:55:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:14,115 INFO L482 AbstractCegarLoop]: Abstraction has 39928 states and 155502 transitions. [2021-06-05 16:55:14,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 39928 states and 155502 transitions. [2021-06-05 16:55:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:14,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:14,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:14,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3605,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:14,385 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1560233875, now seen corresponding path program 147 times [2021-06-05 16:55:14,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:14,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932735214] [2021-06-05 16:55:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:14,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932735214] [2021-06-05 16:55:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932735214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766543200] [2021-06-05 16:55:14,423 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 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 16:55:14,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:14,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766543200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:14,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:55:14,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274511997] [2021-06-05 16:55:14,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:55:14,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:14,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:55:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:55:14,542 INFO L87 Difference]: Start difference. First operand 39928 states and 155502 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:15,548 INFO L93 Difference]: Finished difference Result 58857 states and 220695 transitions. [2021-06-05 16:55:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:55:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:15,732 INFO L225 Difference]: With dead ends: 58857 [2021-06-05 16:55:15,732 INFO L226 Difference]: Without dead ends: 58833 [2021-06-05 16:55:15,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:55:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58833 states. [2021-06-05 16:55:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58833 to 39834. [2021-06-05 16:55:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.894635101548967) internal successors, (155135), 39833 states have internal predecessors, (155135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155135 transitions. [2021-06-05 16:55:17,424 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155135 transitions. Word has length 28 [2021-06-05 16:55:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:17,424 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155135 transitions. [2021-06-05 16:55:17,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155135 transitions. [2021-06-05 16:55:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:17,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:17,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:17,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:17,688 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash -887947539, now seen corresponding path program 148 times [2021-06-05 16:55:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:17,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124453572] [2021-06-05 16:55:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:17,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124453572] [2021-06-05 16:55:17,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124453572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544852568] [2021-06-05 16:55:17,727 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 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 16:55:17,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:17,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:17,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544852568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:17,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:55:17,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509035682] [2021-06-05 16:55:17,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:17,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:17,867 INFO L87 Difference]: Start difference. First operand 39834 states and 155135 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:19,075 INFO L93 Difference]: Finished difference Result 60084 states and 224060 transitions. [2021-06-05 16:55:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:55:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:19,506 INFO L225 Difference]: With dead ends: 60084 [2021-06-05 16:55:19,506 INFO L226 Difference]: Without dead ends: 60084 [2021-06-05 16:55:19,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:55:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-06-05 16:55:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 39930. [2021-06-05 16:55:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39930 states, 39929 states have (on average 3.8931353151844523) internal successors, (155449), 39929 states have internal predecessors, (155449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39930 states to 39930 states and 155449 transitions. [2021-06-05 16:55:20,773 INFO L78 Accepts]: Start accepts. Automaton has 39930 states and 155449 transitions. Word has length 28 [2021-06-05 16:55:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:20,773 INFO L482 AbstractCegarLoop]: Abstraction has 39930 states and 155449 transitions. [2021-06-05 16:55:20,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 39930 states and 155449 transitions. [2021-06-05 16:55:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:20,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:20,845 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:21,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3607 [2021-06-05 16:55:21,046 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:21,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:21,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1943324933, now seen corresponding path program 149 times [2021-06-05 16:55:21,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:21,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112981324] [2021-06-05 16:55:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:21,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112981324] [2021-06-05 16:55:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112981324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321361158] [2021-06-05 16:55:21,091 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 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 16:55:21,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:55:21,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:21,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:21,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321361158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:21,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:55:21,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517169981] [2021-06-05 16:55:21,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:21,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:21,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:21,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:21,237 INFO L87 Difference]: Start difference. First operand 39930 states and 155449 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:22,284 INFO L93 Difference]: Finished difference Result 59771 states and 223172 transitions. [2021-06-05 16:55:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:55:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:22,441 INFO L225 Difference]: With dead ends: 59771 [2021-06-05 16:55:22,441 INFO L226 Difference]: Without dead ends: 59763 [2021-06-05 16:55:22,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:55:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-06-05 16:55:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 39858. [2021-06-05 16:55:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39858 states, 39857 states have (on average 3.894598188523973) internal successors, (155227), 39857 states have internal predecessors, (155227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39858 states to 39858 states and 155227 transitions. [2021-06-05 16:55:24,064 INFO L78 Accepts]: Start accepts. Automaton has 39858 states and 155227 transitions. Word has length 28 [2021-06-05 16:55:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:24,064 INFO L482 AbstractCegarLoop]: Abstraction has 39858 states and 155227 transitions. [2021-06-05 16:55:24,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 39858 states and 155227 transitions. [2021-06-05 16:55:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:24,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:24,125 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:24,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-05 16:55:24,329 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash -460189995, now seen corresponding path program 150 times [2021-06-05 16:55:24,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:24,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760829897] [2021-06-05 16:55:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:55:24,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:24,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760829897] [2021-06-05 16:55:24,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760829897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:24,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525818200] [2021-06-05 16:55:24,363 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 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 16:55:24,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:55:24,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:24,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525818200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:24,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:24,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:55:24,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334550738] [2021-06-05 16:55:24,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:55:24,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:24,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:55:24,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:55:24,476 INFO L87 Difference]: Start difference. First operand 39858 states and 155227 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:25,326 INFO L93 Difference]: Finished difference Result 58502 states and 219661 transitions. [2021-06-05 16:55:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:55:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:25,476 INFO L225 Difference]: With dead ends: 58502 [2021-06-05 16:55:25,476 INFO L226 Difference]: Without dead ends: 58478 [2021-06-05 16:55:25,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:55:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58478 states. [2021-06-05 16:55:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58478 to 39834. [2021-06-05 16:55:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.8947355207993373) internal successors, (155139), 39833 states have internal predecessors, (155139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155139 transitions. [2021-06-05 16:55:27,147 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155139 transitions. Word has length 28 [2021-06-05 16:55:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:27,147 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155139 transitions. [2021-06-05 16:55:27,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155139 transitions. [2021-06-05 16:55:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:27,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:27,222 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:27,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-05 16:55:27,423 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash 117906837, now seen corresponding path program 151 times [2021-06-05 16:55:27,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:27,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041507098] [2021-06-05 16:55:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:27,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:27,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041507098] [2021-06-05 16:55:27,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041507098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:27,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674434614] [2021-06-05 16:55:27,473 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 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 16:55:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:27,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:27,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:27,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674434614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:27,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:27,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:55:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086052489] [2021-06-05 16:55:27,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:55:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:55:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:55:27,579 INFO L87 Difference]: Start difference. First operand 39834 states and 155139 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:29,178 INFO L93 Difference]: Finished difference Result 61684 states and 228711 transitions. [2021-06-05 16:55:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:55:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:29,598 INFO L225 Difference]: With dead ends: 61684 [2021-06-05 16:55:29,598 INFO L226 Difference]: Without dead ends: 61684 [2021-06-05 16:55:29,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 924.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:55:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61684 states. [2021-06-05 16:55:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61684 to 44178. [2021-06-05 16:55:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44178 states, 44177 states have (on average 3.844376032777237) internal successors, (169833), 44177 states have internal predecessors, (169833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44178 states to 44178 states and 169833 transitions. [2021-06-05 16:55:30,880 INFO L78 Accepts]: Start accepts. Automaton has 44178 states and 169833 transitions. Word has length 28 [2021-06-05 16:55:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:30,880 INFO L482 AbstractCegarLoop]: Abstraction has 44178 states and 169833 transitions. [2021-06-05 16:55:30,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 44178 states and 169833 transitions. [2021-06-05 16:55:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:30,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:30,946 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:31,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:31,146 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1190223811, now seen corresponding path program 152 times [2021-06-05 16:55:31,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:31,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159646003] [2021-06-05 16:55:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:31,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:31,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159646003] [2021-06-05 16:55:31,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159646003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:31,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469446071] [2021-06-05 16:55:31,185 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 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 16:55:31,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:31,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:31,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469446071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:31,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:31,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:55:31,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378424316] [2021-06-05 16:55:31,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:55:31,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:31,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:55:31,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:55:31,290 INFO L87 Difference]: Start difference. First operand 44178 states and 169833 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:32,848 INFO L93 Difference]: Finished difference Result 60908 states and 226590 transitions. [2021-06-05 16:55:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:55:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:33,082 INFO L225 Difference]: With dead ends: 60908 [2021-06-05 16:55:33,082 INFO L226 Difference]: Without dead ends: 60900 [2021-06-05 16:55:33,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:55:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60900 states. [2021-06-05 16:55:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60900 to 43034. [2021-06-05 16:55:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 3.86408105407478) internal successors, (166283), 43033 states have internal predecessors, (166283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 166283 transitions. [2021-06-05 16:55:34,483 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 166283 transitions. Word has length 28 [2021-06-05 16:55:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:34,483 INFO L482 AbstractCegarLoop]: Abstraction has 43034 states and 166283 transitions. [2021-06-05 16:55:34,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 166283 transitions. [2021-06-05 16:55:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:34,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:34,552 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:34,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3611 [2021-06-05 16:55:34,753 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1843906959, now seen corresponding path program 153 times [2021-06-05 16:55:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:34,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547403558] [2021-06-05 16:55:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:34,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547403558] [2021-06-05 16:55:34,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547403558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156560816] [2021-06-05 16:55:34,796 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 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 16:55:34,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:55:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:34,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156560816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:34,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:55:34,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976268685] [2021-06-05 16:55:34,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:55:34,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:55:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:55:34,892 INFO L87 Difference]: Start difference. First operand 43034 states and 166283 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:36,019 INFO L93 Difference]: Finished difference Result 59247 states and 221971 transitions. [2021-06-05 16:55:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:55:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:36,559 INFO L225 Difference]: With dead ends: 59247 [2021-06-05 16:55:36,559 INFO L226 Difference]: Without dead ends: 59223 [2021-06-05 16:55:36,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:55:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59223 states. [2021-06-05 16:55:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59223 to 43046. [2021-06-05 16:55:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43046 states, 43045 states have (on average 3.8619351841096528) internal successors, (166237), 43045 states have internal predecessors, (166237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43046 states to 43046 states and 166237 transitions. [2021-06-05 16:55:37,987 INFO L78 Accepts]: Start accepts. Automaton has 43046 states and 166237 transitions. Word has length 28 [2021-06-05 16:55:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:37,987 INFO L482 AbstractCegarLoop]: Abstraction has 43046 states and 166237 transitions. [2021-06-05 16:55:37,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 43046 states and 166237 transitions. [2021-06-05 16:55:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:38,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:38,060 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:38,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3612,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:38,277 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1653229165, now seen corresponding path program 154 times [2021-06-05 16:55:38,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:38,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568256482] [2021-06-05 16:55:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:38,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:38,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568256482] [2021-06-05 16:55:38,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568256482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:38,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570022849] [2021-06-05 16:55:38,330 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 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 16:55:38,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:38,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:38,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:38,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570022849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:38,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:38,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:55:38,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745213918] [2021-06-05 16:55:38,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:55:38,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:55:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:55:38,426 INFO L87 Difference]: Start difference. First operand 43046 states and 166237 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:39,499 INFO L93 Difference]: Finished difference Result 60535 states and 225583 transitions. [2021-06-05 16:55:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:55:39,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:39,663 INFO L225 Difference]: With dead ends: 60535 [2021-06-05 16:55:39,663 INFO L226 Difference]: Without dead ends: 60495 [2021-06-05 16:55:39,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:55:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60495 states. [2021-06-05 16:55:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60495 to 43178. [2021-06-05 16:55:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 3.861245570558399) internal successors, (166717), 43177 states have internal predecessors, (166717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 166717 transitions. [2021-06-05 16:55:41,447 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 166717 transitions. Word has length 28 [2021-06-05 16:55:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:41,447 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 166717 transitions. [2021-06-05 16:55:41,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 166717 transitions. [2021-06-05 16:55:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:41,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:41,517 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:41,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-06-05 16:55:41,718 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:41,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1707857389, now seen corresponding path program 155 times [2021-06-05 16:55:41,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:41,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968365809] [2021-06-05 16:55:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:41,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:41,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968365809] [2021-06-05 16:55:41,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968365809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:41,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669147492] [2021-06-05 16:55:41,763 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 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 16:55:41,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:55:41,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:41,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669147492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:41,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:41,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:55:41,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716447670] [2021-06-05 16:55:41,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:55:41,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:41,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:55:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:41,898 INFO L87 Difference]: Start difference. First operand 43178 states and 166717 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:43,361 INFO L93 Difference]: Finished difference Result 59754 states and 223244 transitions. [2021-06-05 16:55:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:55:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:43,835 INFO L225 Difference]: With dead ends: 59754 [2021-06-05 16:55:43,835 INFO L226 Difference]: Without dead ends: 59754 [2021-06-05 16:55:43,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:55:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59754 states. [2021-06-05 16:55:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59754 to 44087. [2021-06-05 16:55:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44087 states, 44086 states have (on average 3.851517488545116) internal successors, (169798), 44086 states have internal predecessors, (169798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44087 states to 44087 states and 169798 transitions. [2021-06-05 16:55:45,102 INFO L78 Accepts]: Start accepts. Automaton has 44087 states and 169798 transitions. Word has length 28 [2021-06-05 16:55:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:45,102 INFO L482 AbstractCegarLoop]: Abstraction has 44087 states and 169798 transitions. [2021-06-05 16:55:45,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 44087 states and 169798 transitions. [2021-06-05 16:55:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:45,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:45,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:45,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3614,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:45,373 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 652479995, now seen corresponding path program 156 times [2021-06-05 16:55:45,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:45,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256931802] [2021-06-05 16:55:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:45,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:45,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256931802] [2021-06-05 16:55:45,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256931802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:45,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486544148] [2021-06-05 16:55:45,413 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 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 16:55:45,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:55:45,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:45,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:45,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486544148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:45,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:45,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:55:45,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969980740] [2021-06-05 16:55:45,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:55:45,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:55:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:55:45,541 INFO L87 Difference]: Start difference. First operand 44087 states and 169798 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:46,843 INFO L93 Difference]: Finished difference Result 59256 states and 221849 transitions. [2021-06-05 16:55:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:55:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:47,410 INFO L225 Difference]: With dead ends: 59256 [2021-06-05 16:55:47,410 INFO L226 Difference]: Without dead ends: 59248 [2021-06-05 16:55:47,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 703.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:55:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59248 states. [2021-06-05 16:55:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59248 to 44011. [2021-06-05 16:55:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44011 states, 44010 states have (on average 3.8528061804135425) internal successors, (169562), 44010 states have internal predecessors, (169562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44011 states to 44011 states and 169562 transitions. [2021-06-05 16:55:48,787 INFO L78 Accepts]: Start accepts. Automaton has 44011 states and 169562 transitions. Word has length 28 [2021-06-05 16:55:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:48,787 INFO L482 AbstractCegarLoop]: Abstraction has 44011 states and 169562 transitions. [2021-06-05 16:55:48,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 44011 states and 169562 transitions. [2021-06-05 16:55:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:48,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:48,854 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:49,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3615 [2021-06-05 16:55:49,054 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2135614933, now seen corresponding path program 157 times [2021-06-05 16:55:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:49,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198002560] [2021-06-05 16:55:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:49,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198002560] [2021-06-05 16:55:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198002560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899557188] [2021-06-05 16:55:49,094 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 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 16:55:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:49,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899557188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:49,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:49,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:55:49,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107155985] [2021-06-05 16:55:49,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:49,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:49,206 INFO L87 Difference]: Start difference. First operand 44011 states and 169562 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:50,302 INFO L93 Difference]: Finished difference Result 58733 states and 220603 transitions. [2021-06-05 16:55:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:55:50,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:50,458 INFO L225 Difference]: With dead ends: 58733 [2021-06-05 16:55:50,459 INFO L226 Difference]: Without dead ends: 58709 [2021-06-05 16:55:50,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:55:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58709 states. [2021-06-05 16:55:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58709 to 43997. [2021-06-05 16:55:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43997 states, 43996 states have (on average 3.8527820710973724) internal successors, (169507), 43996 states have internal predecessors, (169507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43997 states to 43997 states and 169507 transitions. [2021-06-05 16:55:52,043 INFO L78 Accepts]: Start accepts. Automaton has 43997 states and 169507 transitions. Word has length 28 [2021-06-05 16:55:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:52,043 INFO L482 AbstractCegarLoop]: Abstraction has 43997 states and 169507 transitions. [2021-06-05 16:55:52,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 43997 states and 169507 transitions. [2021-06-05 16:55:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:52,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:52,110 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:52,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3616,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:52,311 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:52,311 INFO L82 PathProgramCache]: Analyzing trace with hash -613280551, now seen corresponding path program 158 times [2021-06-05 16:55:52,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:52,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834171011] [2021-06-05 16:55:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:52,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:52,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834171011] [2021-06-05 16:55:52,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834171011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:52,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399074405] [2021-06-05 16:55:52,351 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 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 16:55:52,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:52,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:52,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:52,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:52,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399074405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:52,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:52,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:55:52,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031842740] [2021-06-05 16:55:52,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:55:52,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:52,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:55:52,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:55:52,456 INFO L87 Difference]: Start difference. First operand 43997 states and 169507 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:53,512 INFO L93 Difference]: Finished difference Result 58515 states and 219910 transitions. [2021-06-05 16:55:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:55:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:53,662 INFO L225 Difference]: With dead ends: 58515 [2021-06-05 16:55:53,662 INFO L226 Difference]: Without dead ends: 58475 [2021-06-05 16:55:53,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:55:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58475 states. [2021-06-05 16:55:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58475 to 44346. [2021-06-05 16:55:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44346 states, 44345 states have (on average 3.854684857368362) internal successors, (170936), 44345 states have internal predecessors, (170936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44346 states to 44346 states and 170936 transitions. [2021-06-05 16:55:55,313 INFO L78 Accepts]: Start accepts. Automaton has 44346 states and 170936 transitions. Word has length 28 [2021-06-05 16:55:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:55,314 INFO L482 AbstractCegarLoop]: Abstraction has 44346 states and 170936 transitions. [2021-06-05 16:55:55,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 44346 states and 170936 transitions. [2021-06-05 16:55:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:55,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:55,390 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:55,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-06-05 16:55:55,590 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1767766801, now seen corresponding path program 159 times [2021-06-05 16:55:55,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:55,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800516402] [2021-06-05 16:55:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:55,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800516402] [2021-06-05 16:55:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800516402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172065636] [2021-06-05 16:55:55,633 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 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 16:55:55,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:55:55,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:55,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172065636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:55,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:55,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:55:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531137983] [2021-06-05 16:55:55,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:55,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:55,754 INFO L87 Difference]: Start difference. First operand 44346 states and 170936 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:56,980 INFO L93 Difference]: Finished difference Result 71060 states and 264453 transitions. [2021-06-05 16:55:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:55:56,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:55:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:57,165 INFO L225 Difference]: With dead ends: 71060 [2021-06-05 16:55:57,165 INFO L226 Difference]: Without dead ends: 71060 [2021-06-05 16:55:57,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 611.9ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:55:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71060 states. [2021-06-05 16:55:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71060 to 45512. [2021-06-05 16:55:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45512 states, 45511 states have (on average 3.869196457999165) internal successors, (176091), 45511 states have internal predecessors, (176091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45512 states to 45512 states and 176091 transitions. [2021-06-05 16:55:58,864 INFO L78 Accepts]: Start accepts. Automaton has 45512 states and 176091 transitions. Word has length 28 [2021-06-05 16:55:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:58,864 INFO L482 AbstractCegarLoop]: Abstraction has 45512 states and 176091 transitions. [2021-06-05 16:55:58,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 45512 states and 176091 transitions. [2021-06-05 16:55:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:55:58,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:58,928 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:59,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3618 [2021-06-05 16:55:59,129 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:59,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1155272981, now seen corresponding path program 160 times [2021-06-05 16:55:59,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:59,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668911111] [2021-06-05 16:55:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:59,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668911111] [2021-06-05 16:55:59,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668911111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411972436] [2021-06-05 16:55:59,185 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 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 16:55:59,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:59,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:55:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:59,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411972436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:59,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:59,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:55:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332712517] [2021-06-05 16:55:59,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:55:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:55:59,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:55:59,304 INFO L87 Difference]: Start difference. First operand 45512 states and 176091 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:00,461 INFO L93 Difference]: Finished difference Result 65145 states and 245703 transitions. [2021-06-05 16:56:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:56:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:00,625 INFO L225 Difference]: With dead ends: 65145 [2021-06-05 16:56:00,625 INFO L226 Difference]: Without dead ends: 65145 [2021-06-05 16:56:00,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 559.6ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:56:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65145 states. [2021-06-05 16:56:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65145 to 45542. [2021-06-05 16:56:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45542 states, 45541 states have (on average 3.868997167387629) internal successors, (176198), 45541 states have internal predecessors, (176198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45542 states to 45542 states and 176198 transitions. [2021-06-05 16:56:02,299 INFO L78 Accepts]: Start accepts. Automaton has 45542 states and 176198 transitions. Word has length 28 [2021-06-05 16:56:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:02,299 INFO L482 AbstractCegarLoop]: Abstraction has 45542 states and 176198 transitions. [2021-06-05 16:56:02,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 45542 states and 176198 transitions. [2021-06-05 16:56:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:02,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:02,367 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:02,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3619 [2021-06-05 16:56:02,567 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:02,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:02,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2039891173, now seen corresponding path program 161 times [2021-06-05 16:56:02,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:02,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836900732] [2021-06-05 16:56:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:02,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836900732] [2021-06-05 16:56:02,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836900732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300269226] [2021-06-05 16:56:02,606 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 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 16:56:02,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:56:02,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:02,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300269226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:02,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:02,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:56:02,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175944415] [2021-06-05 16:56:02,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:56:02,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:56:02,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:56:02,761 INFO L87 Difference]: Start difference. First operand 45542 states and 176198 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:04,710 INFO L93 Difference]: Finished difference Result 66003 states and 248139 transitions. [2021-06-05 16:56:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:56:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:04,911 INFO L225 Difference]: With dead ends: 66003 [2021-06-05 16:56:04,911 INFO L226 Difference]: Without dead ends: 66003 [2021-06-05 16:56:04,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:56:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66003 states. [2021-06-05 16:56:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66003 to 45806. [2021-06-05 16:56:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45806 states, 45805 states have (on average 3.8654295382600155) internal successors, (177056), 45805 states have internal predecessors, (177056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45806 states to 45806 states and 177056 transitions. [2021-06-05 16:56:06,348 INFO L78 Accepts]: Start accepts. Automaton has 45806 states and 177056 transitions. Word has length 28 [2021-06-05 16:56:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:06,348 INFO L482 AbstractCegarLoop]: Abstraction has 45806 states and 177056 transitions. [2021-06-05 16:56:06,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 45806 states and 177056 transitions. [2021-06-05 16:56:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:06,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:06,416 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:06,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:06,616 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 984513779, now seen corresponding path program 162 times [2021-06-05 16:56:06,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:06,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325833866] [2021-06-05 16:56:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:06,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:06,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325833866] [2021-06-05 16:56:06,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325833866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:06,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893484719] [2021-06-05 16:56:06,657 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 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 16:56:06,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:56:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:06,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893484719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:06,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:06,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:56:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542238232] [2021-06-05 16:56:06,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:56:06,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:06,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:56:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:56:06,782 INFO L87 Difference]: Start difference. First operand 45806 states and 177056 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:08,516 INFO L93 Difference]: Finished difference Result 65215 states and 245904 transitions. [2021-06-05 16:56:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:56:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:08,696 INFO L225 Difference]: With dead ends: 65215 [2021-06-05 16:56:08,696 INFO L226 Difference]: Without dead ends: 65211 [2021-06-05 16:56:08,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 746.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:56:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65211 states. [2021-06-05 16:56:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65211 to 45442. [2021-06-05 16:56:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45442 states, 45441 states have (on average 3.869193019519817) internal successors, (175820), 45441 states have internal predecessors, (175820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45442 states to 45442 states and 175820 transitions. [2021-06-05 16:56:10,151 INFO L78 Accepts]: Start accepts. Automaton has 45442 states and 175820 transitions. Word has length 28 [2021-06-05 16:56:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:10,151 INFO L482 AbstractCegarLoop]: Abstraction has 45442 states and 175820 transitions. [2021-06-05 16:56:10,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 45442 states and 175820 transitions. [2021-06-05 16:56:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:10,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:10,219 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:10,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3621 [2021-06-05 16:56:10,420 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 452743569, now seen corresponding path program 163 times [2021-06-05 16:56:10,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:10,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768874135] [2021-06-05 16:56:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:10,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:10,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768874135] [2021-06-05 16:56:10,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768874135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:10,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269846659] [2021-06-05 16:56:10,461 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 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 16:56:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:10,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269846659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:10,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:10,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:56:10,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116344052] [2021-06-05 16:56:10,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:56:10,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:56:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:56:10,581 INFO L87 Difference]: Start difference. First operand 45442 states and 175820 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:11,885 INFO L93 Difference]: Finished difference Result 59545 states and 226305 transitions. [2021-06-05 16:56:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:56:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:12,035 INFO L225 Difference]: With dead ends: 59545 [2021-06-05 16:56:12,035 INFO L226 Difference]: Without dead ends: 59545 [2021-06-05 16:56:12,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:56:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2021-06-05 16:56:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 45458. [2021-06-05 16:56:13,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45458 states, 45457 states have (on average 3.8710869613040897) internal successors, (175968), 45457 states have internal predecessors, (175968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45458 states to 45458 states and 175968 transitions. [2021-06-05 16:56:13,346 INFO L78 Accepts]: Start accepts. Automaton has 45458 states and 175968 transitions. Word has length 28 [2021-06-05 16:56:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:13,346 INFO L482 AbstractCegarLoop]: Abstraction has 45458 states and 175968 transitions. [2021-06-05 16:56:13,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 45458 states and 175968 transitions. [2021-06-05 16:56:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:13,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:13,413 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:13,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:13,614 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash 75176401, now seen corresponding path program 164 times [2021-06-05 16:56:13,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:13,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893827687] [2021-06-05 16:56:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:13,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:13,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893827687] [2021-06-05 16:56:13,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893827687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:13,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090612075] [2021-06-05 16:56:13,662 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 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 16:56:13,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:13,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090612075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:13,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:13,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:56:13,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513591316] [2021-06-05 16:56:13,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:56:13,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:13,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:56:13,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:56:13,822 INFO L87 Difference]: Start difference. First operand 45458 states and 175968 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:14,591 INFO L93 Difference]: Finished difference Result 58859 states and 224430 transitions. [2021-06-05 16:56:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:56:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:14,748 INFO L225 Difference]: With dead ends: 58859 [2021-06-05 16:56:14,748 INFO L226 Difference]: Without dead ends: 58847 [2021-06-05 16:56:14,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:56:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58847 states. [2021-06-05 16:56:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58847 to 45392. [2021-06-05 16:56:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45392 states, 45391 states have (on average 3.8722433962679825) internal successors, (175765), 45391 states have internal predecessors, (175765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45392 states to 45392 states and 175765 transitions. [2021-06-05 16:56:16,528 INFO L78 Accepts]: Start accepts. Automaton has 45392 states and 175765 transitions. Word has length 28 [2021-06-05 16:56:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:16,528 INFO L482 AbstractCegarLoop]: Abstraction has 45392 states and 175765 transitions. [2021-06-05 16:56:16,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 45392 states and 175765 transitions. [2021-06-05 16:56:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:16,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:16,610 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:16,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3623 [2021-06-05 16:56:16,810 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:16,811 INFO L82 PathProgramCache]: Analyzing trace with hash -681682287, now seen corresponding path program 165 times [2021-06-05 16:56:16,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:16,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815033518] [2021-06-05 16:56:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:16,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:16,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815033518] [2021-06-05 16:56:16,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815033518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:16,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509772877] [2021-06-05 16:56:16,856 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 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 16:56:16,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:56:16,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:16,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:16,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509772877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:16,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:16,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:56:16,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696225084] [2021-06-05 16:56:16,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:56:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:56:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:56:16,973 INFO L87 Difference]: Start difference. First operand 45392 states and 175765 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:17,653 INFO L93 Difference]: Finished difference Result 49879 states and 190563 transitions. [2021-06-05 16:56:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:56:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:17,787 INFO L225 Difference]: With dead ends: 49879 [2021-06-05 16:56:17,787 INFO L226 Difference]: Without dead ends: 49879 [2021-06-05 16:56:17,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:56:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49879 states. [2021-06-05 16:56:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49879 to 45600. [2021-06-05 16:56:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45600 states, 45599 states have (on average 3.8697559156999057) internal successors, (176457), 45599 states have internal predecessors, (176457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45600 states to 45600 states and 176457 transitions. [2021-06-05 16:56:19,192 INFO L78 Accepts]: Start accepts. Automaton has 45600 states and 176457 transitions. Word has length 28 [2021-06-05 16:56:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:19,192 INFO L482 AbstractCegarLoop]: Abstraction has 45600 states and 176457 transitions. [2021-06-05 16:56:19,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 45600 states and 176457 transitions. [2021-06-05 16:56:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:19,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:19,260 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:19,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:19,461 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash -852441489, now seen corresponding path program 166 times [2021-06-05 16:56:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:19,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226131491] [2021-06-05 16:56:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:19,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:19,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226131491] [2021-06-05 16:56:19,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226131491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:19,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900305154] [2021-06-05 16:56:19,497 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 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 16:56:19,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:19,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:19,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:19,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900305154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:19,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:19,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:56:19,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564577597] [2021-06-05 16:56:19,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:56:19,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:19,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:56:19,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:56:19,608 INFO L87 Difference]: Start difference. First operand 45600 states and 176457 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:20,457 INFO L93 Difference]: Finished difference Result 49726 states and 190165 transitions. [2021-06-05 16:56:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:20,583 INFO L225 Difference]: With dead ends: 49726 [2021-06-05 16:56:20,584 INFO L226 Difference]: Without dead ends: 49722 [2021-06-05 16:56:20,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49722 states. [2021-06-05 16:56:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49722 to 45540. [2021-06-05 16:56:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45540 states, 45539 states have (on average 3.8706383539383826) internal successors, (176265), 45539 states have internal predecessors, (176265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45540 states to 45540 states and 176265 transitions. [2021-06-05 16:56:21,812 INFO L78 Accepts]: Start accepts. Automaton has 45540 states and 176265 transitions. Word has length 28 [2021-06-05 16:56:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:21,813 INFO L482 AbstractCegarLoop]: Abstraction has 45540 states and 176265 transitions. [2021-06-05 16:56:21,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 45540 states and 176265 transitions. [2021-06-05 16:56:21,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:21,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:21,883 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:22,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-06-05 16:56:22,083 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:22,084 INFO L82 PathProgramCache]: Analyzing trace with hash -492872947, now seen corresponding path program 81 times [2021-06-05 16:56:22,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:22,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850044916] [2021-06-05 16:56:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:22,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850044916] [2021-06-05 16:56:22,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850044916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126164254] [2021-06-05 16:56:22,123 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 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 16:56:22,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:56:22,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:22,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:22,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126164254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:22,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:22,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:56:22,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344564694] [2021-06-05 16:56:22,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:22,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:22,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:22,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:22,203 INFO L87 Difference]: Start difference. First operand 45540 states and 176265 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:22,769 INFO L93 Difference]: Finished difference Result 49767 states and 190248 transitions. [2021-06-05 16:56:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:56:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:22,903 INFO L225 Difference]: With dead ends: 49767 [2021-06-05 16:56:22,903 INFO L226 Difference]: Without dead ends: 49767 [2021-06-05 16:56:22,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49767 states. [2021-06-05 16:56:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49767 to 45644. [2021-06-05 16:56:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45644 states, 45643 states have (on average 3.8689174681769383) internal successors, (176589), 45643 states have internal predecessors, (176589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45644 states to 45644 states and 176589 transitions. [2021-06-05 16:56:24,178 INFO L78 Accepts]: Start accepts. Automaton has 45644 states and 176589 transitions. Word has length 28 [2021-06-05 16:56:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:24,178 INFO L482 AbstractCegarLoop]: Abstraction has 45644 states and 176589 transitions. [2021-06-05 16:56:24,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45644 states and 176589 transitions. [2021-06-05 16:56:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:24,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:24,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:24,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3626,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:24,448 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1753160091, now seen corresponding path program 82 times [2021-06-05 16:56:24,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:24,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885973850] [2021-06-05 16:56:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:24,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:24,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885973850] [2021-06-05 16:56:24,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885973850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:24,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200860034] [2021-06-05 16:56:24,489 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 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 16:56:24,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:24,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200860034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:24,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:24,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:56:24,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218606041] [2021-06-05 16:56:24,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:56:24,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:56:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:56:24,607 INFO L87 Difference]: Start difference. First operand 45644 states and 176589 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:25,474 INFO L93 Difference]: Finished difference Result 56748 states and 216058 transitions. [2021-06-05 16:56:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:56:25,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:25,627 INFO L225 Difference]: With dead ends: 56748 [2021-06-05 16:56:25,628 INFO L226 Difference]: Without dead ends: 56658 [2021-06-05 16:56:25,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:56:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56658 states. [2021-06-05 16:56:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56658 to 45467. [2021-06-05 16:56:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45467 states, 45466 states have (on average 3.8675713720142526) internal successors, (175843), 45466 states have internal predecessors, (175843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45467 states to 45467 states and 175843 transitions. [2021-06-05 16:56:26,880 INFO L78 Accepts]: Start accepts. Automaton has 45467 states and 175843 transitions. Word has length 28 [2021-06-05 16:56:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:26,880 INFO L482 AbstractCegarLoop]: Abstraction has 45467 states and 175843 transitions. [2021-06-05 16:56:26,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:26,880 INFO L276 IsEmpty]: Start isEmpty. Operand 45467 states and 175843 transitions. [2021-06-05 16:56:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:26,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:26,948 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:27,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3627 [2021-06-05 16:56:27,153 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash -115621907, now seen corresponding path program 83 times [2021-06-05 16:56:27,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:27,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198114646] [2021-06-05 16:56:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:27,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:27,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198114646] [2021-06-05 16:56:27,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198114646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:27,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681641412] [2021-06-05 16:56:27,186 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 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 16:56:27,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:56:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:27,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:56:27,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681641412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:27,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:27,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 16:56:27,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864164017] [2021-06-05 16:56:27,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:56:27,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:27,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:56:27,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:56:27,257 INFO L87 Difference]: Start difference. First operand 45467 states and 175843 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:27,714 INFO L93 Difference]: Finished difference Result 49946 states and 190806 transitions. [2021-06-05 16:56:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:56:27,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:27,843 INFO L225 Difference]: With dead ends: 49946 [2021-06-05 16:56:27,843 INFO L226 Difference]: Without dead ends: 49934 [2021-06-05 16:56:27,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-06-05 16:56:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45605. [2021-06-05 16:56:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.865713533900535) internal successors, (176292), 45604 states have internal predecessors, (176292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176292 transitions. [2021-06-05 16:56:29,160 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176292 transitions. Word has length 28 [2021-06-05 16:56:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:29,160 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176292 transitions. [2021-06-05 16:56:29,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176292 transitions. [2021-06-05 16:56:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:29,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:29,608 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:29,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3628 [2021-06-05 16:56:29,825 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:29,825 INFO L82 PathProgramCache]: Analyzing trace with hash -903981331, now seen corresponding path program 84 times [2021-06-05 16:56:29,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:29,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375352938] [2021-06-05 16:56:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:29,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:29,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375352938] [2021-06-05 16:56:29,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375352938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:29,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574656714] [2021-06-05 16:56:29,877 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 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 16:56:29,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:56:29,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:29,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:56:29,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:29,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574656714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:29,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:29,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:56:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826104817] [2021-06-05 16:56:29,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:56:29,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:56:29,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:56:29,971 INFO L87 Difference]: Start difference. First operand 45605 states and 176292 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:30,465 INFO L93 Difference]: Finished difference Result 49910 states and 190722 transitions. [2021-06-05 16:56:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:30,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:30,593 INFO L225 Difference]: With dead ends: 49910 [2021-06-05 16:56:30,594 INFO L226 Difference]: Without dead ends: 49890 [2021-06-05 16:56:30,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:56:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49890 states. [2021-06-05 16:56:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49890 to 45605. [2021-06-05 16:56:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.86562582229629) internal successors, (176288), 45604 states have internal predecessors, (176288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176288 transitions. [2021-06-05 16:56:31,748 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176288 transitions. Word has length 28 [2021-06-05 16:56:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:31,748 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176288 transitions. [2021-06-05 16:56:31,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176288 transitions. [2021-06-05 16:56:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:31,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:31,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:32,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3629 [2021-06-05 16:56:32,015 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash 987543313, now seen corresponding path program 167 times [2021-06-05 16:56:32,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:32,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437094253] [2021-06-05 16:56:32,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:32,050 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 16:56:32,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:32,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437094253] [2021-06-05 16:56:32,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437094253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:32,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019619438] [2021-06-05 16:56:32,051 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 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 16:56:32,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:56:32,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:56:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:32,137 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 16:56:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019619438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:32,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:32,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:56:32,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445174543] [2021-06-05 16:56:32,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:32,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:32,138 INFO L87 Difference]: Start difference. First operand 45605 states and 176288 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:32,564 INFO L93 Difference]: Finished difference Result 50572 states and 193874 transitions. [2021-06-05 16:56:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:56:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:32,693 INFO L225 Difference]: With dead ends: 50572 [2021-06-05 16:56:32,693 INFO L226 Difference]: Without dead ends: 50559 [2021-06-05 16:56:32,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:56:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2021-06-05 16:56:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 48338. [2021-06-05 16:56:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48338 states, 48337 states have (on average 3.8743819434387734) internal successors, (187276), 48337 states have internal predecessors, (187276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48338 states to 48338 states and 187276 transitions. [2021-06-05 16:56:34,357 INFO L78 Accepts]: Start accepts. Automaton has 48338 states and 187276 transitions. Word has length 28 [2021-06-05 16:56:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:34,358 INFO L482 AbstractCegarLoop]: Abstraction has 48338 states and 187276 transitions. [2021-06-05 16:56:34,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48338 states and 187276 transitions. [2021-06-05 16:56:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:34,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:34,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:34,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:34,632 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash 304798983, now seen corresponding path program 168 times [2021-06-05 16:56:34,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:34,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114921469] [2021-06-05 16:56:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:34,668 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 16:56:34,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:34,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114921469] [2021-06-05 16:56:34,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114921469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:34,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241524768] [2021-06-05 16:56:34,668 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 16:56:34,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:56:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:56:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:34,760 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 16:56:34,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241524768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:34,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:34,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:56:34,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632380151] [2021-06-05 16:56:34,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:34,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:34,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:34,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:34,760 INFO L87 Difference]: Start difference. First operand 48338 states and 187276 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:35,251 INFO L93 Difference]: Finished difference Result 53920 states and 205320 transitions. [2021-06-05 16:56:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:56:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:35,398 INFO L225 Difference]: With dead ends: 53920 [2021-06-05 16:56:35,398 INFO L226 Difference]: Without dead ends: 53920 [2021-06-05 16:56:35,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53920 states. [2021-06-05 16:56:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53920 to 42878. [2021-06-05 16:56:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 3.8613708981505237) internal successors, (165564), 42877 states have internal predecessors, (165564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 165564 transitions. [2021-06-05 16:56:36,597 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 165564 transitions. Word has length 28 [2021-06-05 16:56:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:36,597 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 165564 transitions. [2021-06-05 16:56:36,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 165564 transitions. [2021-06-05 16:56:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:36,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:36,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:36,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3631,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:36,862 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash -15319481, now seen corresponding path program 169 times [2021-06-05 16:56:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:36,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474340792] [2021-06-05 16:56:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:36,905 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 16:56:36,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:36,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474340792] [2021-06-05 16:56:36,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474340792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271144679] [2021-06-05 16:56:36,905 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 16:56:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:56:36,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:36,997 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 16:56:36,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271144679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:36,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:56:36,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281934855] [2021-06-05 16:56:36,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:36,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:36,998 INFO L87 Difference]: Start difference. First operand 42878 states and 165564 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:37,821 INFO L93 Difference]: Finished difference Result 47758 states and 181995 transitions. [2021-06-05 16:56:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:37,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:37,962 INFO L225 Difference]: With dead ends: 47758 [2021-06-05 16:56:37,963 INFO L226 Difference]: Without dead ends: 47758 [2021-06-05 16:56:37,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:56:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47758 states. [2021-06-05 16:56:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47758 to 43711. [2021-06-05 16:56:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43711 states, 43710 states have (on average 3.8600320292839165) internal successors, (168722), 43710 states have internal predecessors, (168722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43711 states to 43711 states and 168722 transitions. [2021-06-05 16:56:39,151 INFO L78 Accepts]: Start accepts. Automaton has 43711 states and 168722 transitions. Word has length 28 [2021-06-05 16:56:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:39,151 INFO L482 AbstractCegarLoop]: Abstraction has 43711 states and 168722 transitions. [2021-06-05 16:56:39,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 43711 states and 168722 transitions. [2021-06-05 16:56:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:39,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:39,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:39,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:39,441 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1024489657, now seen corresponding path program 170 times [2021-06-05 16:56:39,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:39,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203181418] [2021-06-05 16:56:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:39,486 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 16:56:39,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:39,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203181418] [2021-06-05 16:56:39,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203181418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845542124] [2021-06-05 16:56:39,486 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 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 16:56:39,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:39,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:56:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:39,574 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 16:56:39,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845542124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:39,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:56:39,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709833592] [2021-06-05 16:56:39,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:56:39,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:56:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:56:39,575 INFO L87 Difference]: Start difference. First operand 43711 states and 168722 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:40,013 INFO L93 Difference]: Finished difference Result 45468 states and 174583 transitions. [2021-06-05 16:56:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:56:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:40,124 INFO L225 Difference]: With dead ends: 45468 [2021-06-05 16:56:40,124 INFO L226 Difference]: Without dead ends: 45468 [2021-06-05 16:56:40,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:56:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45468 states. [2021-06-05 16:56:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45468 to 43719. [2021-06-05 16:56:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43719 states, 43718 states have (on average 3.85987465117343) internal successors, (168746), 43718 states have internal predecessors, (168746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43719 states to 43719 states and 168746 transitions. [2021-06-05 16:56:41,187 INFO L78 Accepts]: Start accepts. Automaton has 43719 states and 168746 transitions. Word has length 28 [2021-06-05 16:56:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:41,187 INFO L482 AbstractCegarLoop]: Abstraction has 43719 states and 168746 transitions. [2021-06-05 16:56:41,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 43719 states and 168746 transitions. [2021-06-05 16:56:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:56:41,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:41,252 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:41,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3633,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:41,453 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1121758121, now seen corresponding path program 171 times [2021-06-05 16:56:41,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:41,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290069014] [2021-06-05 16:56:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:41,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290069014] [2021-06-05 16:56:41,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290069014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102554910] [2021-06-05 16:56:41,494 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 16:56:41,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:56:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:56:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:41,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102554910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:41,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:41,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:56:41,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707306412] [2021-06-05 16:56:41,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:56:41,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:56:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:56:41,595 INFO L87 Difference]: Start difference. First operand 43719 states and 168746 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:42,021 INFO L93 Difference]: Finished difference Result 45188 states and 173661 transitions. [2021-06-05 16:56:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:56:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:56:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:42,138 INFO L225 Difference]: With dead ends: 45188 [2021-06-05 16:56:42,138 INFO L226 Difference]: Without dead ends: 45188 [2021-06-05 16:56:42,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:56:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45188 states. [2021-06-05 16:56:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45188 to 43613. [2021-06-05 16:56:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43613 states, 43612 states have (on average 3.859534073190865) internal successors, (168322), 43612 states have internal predecessors, (168322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 168322 transitions. [2021-06-05 16:56:43,300 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 168322 transitions. Word has length 28 [2021-06-05 16:56:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:43,300 INFO L482 AbstractCegarLoop]: Abstraction has 43613 states and 168322 transitions. [2021-06-05 16:56:43,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 168322 transitions. [2021-06-05 16:56:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:43,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:43,365 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:43,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3634,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:43,565 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:43,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1358211129, now seen corresponding path program 172 times [2021-06-05 16:56:43,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:43,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869821134] [2021-06-05 16:56:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:43,877 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 16:56:44,309 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 16:56:44,447 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 16:56:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:44,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:44,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869821134] [2021-06-05 16:56:44,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869821134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:44,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998617553] [2021-06-05 16:56:44,725 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 16:56:44,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:56:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:45,137 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 16:56:45,372 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:56:45,926 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2021-06-05 16:56:46,167 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:56:46,404 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:56:46,541 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 98 [2021-06-05 16:56:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:46,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:46,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:46,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 16:56:46,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:46,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:46,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:56:46,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:47,384 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 147 [2021-06-05 16:56:47,385 INFO L628 ElimStorePlain]: treesize reduction 364, result has 54.9 percent of original size [2021-06-05 16:56:47,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:47,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:47,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-06-05 16:56:47,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:47,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:47,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:56:47,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:47,579 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 16:56:47,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:56:47,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:47,747 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:56:47,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:47,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:56:47,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:47,905 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:56:47,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:47,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:47,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:56:47,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:48,056 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:56:48,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:48,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:48,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:48,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:56:48,065 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:48,201 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:56:48,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:48,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:48,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:48,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:56:48,210 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:48,339 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:56:48,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:56:48,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:56:48,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:56:48,348 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:48,471 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:56:48,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:48,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:56:48,477 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:867, output treesize:87 [2021-06-05 16:56:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:48,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998617553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:48,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:48,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:56:48,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400974654] [2021-06-05 16:56:48,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:56:48,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:56:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:56:48,561 INFO L87 Difference]: Start difference. First operand 43613 states and 168322 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:48,768 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-06-05 16:56:49,017 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-06-05 16:56:49,559 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2021-06-05 16:56:49,879 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2021-06-05 16:56:50,397 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 16:56:51,128 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2021-06-05 16:56:51,836 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-06-05 16:56:53,053 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2021-06-05 16:56:53,288 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 16:56:53,506 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:56:53,960 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-06-05 16:56:54,468 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 131 [2021-06-05 16:56:54,933 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2021-06-05 16:56:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:55,431 INFO L93 Difference]: Finished difference Result 46436 states and 176472 transitions. [2021-06-05 16:56:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:56:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:55,541 INFO L225 Difference]: With dead ends: 46436 [2021-06-05 16:56:55,541 INFO L226 Difference]: Without dead ends: 46376 [2021-06-05 16:56:55,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 8074.9ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:56:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46376 states. [2021-06-05 16:56:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46376 to 43670. [2021-06-05 16:56:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43670 states, 43669 states have (on average 3.858686940392498) internal successors, (168505), 43669 states have internal predecessors, (168505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43670 states to 43670 states and 168505 transitions. [2021-06-05 16:56:56,604 INFO L78 Accepts]: Start accepts. Automaton has 43670 states and 168505 transitions. Word has length 30 [2021-06-05 16:56:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:56,604 INFO L482 AbstractCegarLoop]: Abstraction has 43670 states and 168505 transitions. [2021-06-05 16:56:56,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 43670 states and 168505 transitions. [2021-06-05 16:56:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:56,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:56,671 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:56,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3635 [2021-06-05 16:56:56,874 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash 908358151, now seen corresponding path program 173 times [2021-06-05 16:56:56,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:56,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740353675] [2021-06-05 16:56:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:57,251 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2021-06-05 16:56:57,460 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-05 16:56:57,640 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 16:56:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:57,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:57,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740353675] [2021-06-05 16:56:57,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740353675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:57,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883921195] [2021-06-05 16:56:57,918 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 16:56:57,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:56:57,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:56:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:58,341 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 16:56:58,589 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:56:58,834 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 16:56:59,177 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:56:59,431 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:57:00,275 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 124 [2021-06-05 16:57:00,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:00,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:00,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2021-06-05 16:57:00,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:00,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:00,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:00,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-06-05 16:57:00,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:00,889 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 154 [2021-06-05 16:57:00,889 INFO L628 ElimStorePlain]: treesize reduction 149, result has 75.5 percent of original size [2021-06-05 16:57:00,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:00,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:00,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-06-05 16:57:00,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,104 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:57:01,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:01,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:57:01,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,402 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 16:57:01,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:01,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:57:01,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:57:01,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,760 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2021-06-05 16:57:01,761 INFO L628 ElimStorePlain]: treesize reduction 22, result has 94.1 percent of original size [2021-06-05 16:57:01,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:57:01,770 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,920 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:57:01,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:57:01,932 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:01,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:57:01,941 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:02,174 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2021-06-05 16:57:02,174 INFO L628 ElimStorePlain]: treesize reduction 22, result has 91.7 percent of original size [2021-06-05 16:57:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:02,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:02,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:57:02,183 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:02,288 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:57:02,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:02,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:02,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:57:02,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:02,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:02,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:57:02,398 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:689, output treesize:93 [2021-06-05 16:57:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:02,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883921195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:02,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:02,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:57:02,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212561181] [2021-06-05 16:57:02,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:57:02,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:57:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:57:02,489 INFO L87 Difference]: Start difference. First operand 43670 states and 168505 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:02,694 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-06-05 16:57:02,926 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-06-05 16:57:03,289 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 16:57:04,202 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 138 [2021-06-05 16:57:04,858 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-06-05 16:57:05,989 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 142 [2021-06-05 16:57:06,343 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:57:06,844 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2021-06-05 16:57:07,333 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:57:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:07,649 INFO L93 Difference]: Finished difference Result 43954 states and 169226 transitions. [2021-06-05 16:57:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:57:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:07,754 INFO L225 Difference]: With dead ends: 43954 [2021-06-05 16:57:07,754 INFO L226 Difference]: Without dead ends: 43924 [2021-06-05 16:57:07,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 6510.1ms TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:57:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43924 states. [2021-06-05 16:57:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43924 to 43662. [2021-06-05 16:57:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43662 states, 43661 states have (on average 3.8589129887084583) internal successors, (168484), 43661 states have internal predecessors, (168484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43662 states to 43662 states and 168484 transitions. [2021-06-05 16:57:08,767 INFO L78 Accepts]: Start accepts. Automaton has 43662 states and 168484 transitions. Word has length 30 [2021-06-05 16:57:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:08,767 INFO L482 AbstractCegarLoop]: Abstraction has 43662 states and 168484 transitions. [2021-06-05 16:57:08,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 43662 states and 168484 transitions. [2021-06-05 16:57:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:08,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:08,835 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:09,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:09,037 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:09,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1795179837, now seen corresponding path program 174 times [2021-06-05 16:57:09,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:09,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671305001] [2021-06-05 16:57:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:09,442 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 16:57:09,656 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-06-05 16:57:09,813 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 16:57:09,959 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-06-05 16:57:10,087 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2021-06-05 16:57:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:10,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:10,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671305001] [2021-06-05 16:57:10,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671305001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:10,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067873491] [2021-06-05 16:57:10,188 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 16:57:10,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:57:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:57:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:10,784 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 16:57:11,088 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:57:11,487 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 16:57:12,061 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:57:12,713 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2021-06-05 16:57:15,864 WARN L205 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 175 Received shutdown request... [2021-06-05 16:57:16,619 WARN L222 SmtUtils]: Removed 13 from assertion stack [2021-06-05 16:57:16,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3717 [2021-06-05 16:57:16,820 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:57:16,821 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:57:16,823 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:57:16,823 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:57:16 BasicIcfg [2021-06-05 16:57:16,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:57:16,824 INFO L168 Benchmark]: Toolchain (without parser) took 761215.99 ms. Allocated memory was 331.4 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 310.6 MB in the beginning and 12.3 GB in the end (delta: -12.0 GB). Peak memory consumption was 3.6 GB. Max. memory is 16.0 GB. [2021-06-05 16:57:16,824 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 331.4 MB. Free memory was 311.8 MB in the beginning and 311.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:57:16,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 331.4 MB. Free memory was 310.5 MB in the beginning and 309.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:57:16,824 INFO L168 Benchmark]: Boogie Preprocessor took 14.76 ms. Allocated memory is still 331.4 MB. Free memory was 309.0 MB in the beginning and 308.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:57:16,824 INFO L168 Benchmark]: RCFGBuilder took 282.03 ms. Allocated memory is still 331.4 MB. Free memory was 307.9 MB in the beginning and 294.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:57:16,824 INFO L168 Benchmark]: TraceAbstraction took 760890.54 ms. Allocated memory was 331.4 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 293.9 MB in the beginning and 12.3 GB in the end (delta: -12.0 GB). Peak memory consumption was 3.6 GB. Max. memory is 16.0 GB. [2021-06-05 16:57:16,824 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 0.13 ms. Allocated memory is still 331.4 MB. Free memory was 311.8 MB in the beginning and 311.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.23 ms. Allocated memory is still 331.4 MB. Free memory was 310.5 MB in the beginning and 309.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.76 ms. Allocated memory is still 331.4 MB. Free memory was 309.0 MB in the beginning and 308.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 282.03 ms. Allocated memory is still 331.4 MB. Free memory was 307.9 MB in the beginning and 294.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 760890.54 ms. Allocated memory was 331.4 MB in the beginning and 15.9 GB in the end (delta: 15.6 GB). Free memory was 293.9 MB in the beginning and 12.3 GB in the end (delta: -12.0 GB). Peak memory consumption was 3.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 477 for 189ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 477 for 189ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 477 for 189ms.. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 477 for 189ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 760788.9ms, OverallIterations: 260, TraceHistogramMax: 3, EmptinessCheckTime: 4936.2ms, AutomataDifference: 379584.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11403 SDtfs, 71358 SDslu, 87490 SDs, 0 SdLazy, 141124 SolverSat, 12985 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83638.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16517 GetRequests, 5479 SyntacticMatches, 247 SemanticMatches, 10791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179733 ImplicationChecksByTransitivity, 342149.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48338occurred in iteration=253, InterpolantAutomatonStates: 9573, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84845.2ms AutomataMinimizationTime, 259 MinimizatonAttempts, 1250509 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 887.9ms SsaConstructionTime, 3152.9ms SatisfiabilityAnalysisTime, 221861.0ms InterpolantComputationTime, 13778 NumberOfCodeBlocks, 13778 NumberOfCodeBlocksAsserted, 898 NumberOfCheckSat, 13262 ConstructedInterpolants, 158 QuantifiedInterpolants, 280859 SizeOfPredicates, 1252 NumberOfNonLiveVariables, 19144 ConjunctsInSsa, 4305 ConjunctsInUnsatCore, 516 InterpolantComputations, 2 PerfectInterpolantSequences, 1020/4369 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