/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:27:57,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:27:57,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:27:57,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:27:57,501 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.epf [2021-06-05 21:27:57,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:27:57,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:27:57,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:27:57,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:27:57,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:27:57,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:27:57,528 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:27:57,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:27:57,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:27:57,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:27:57,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:27:57,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:27:57,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:27:57,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:27:57,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:27:57,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:27:57,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:27:57,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:27:57,770 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:27:57,770 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:27:57,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-06-05 21:27:57,771 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-06-05 21:27:57,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:27:57,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:27:57,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:27:57,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:27:57,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:27:57,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:27:57,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:27:57,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:27:57,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:27:57,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/1) ... [2021-06-05 21:27:57,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:27:57,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:27:57,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:27:57,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:27:57,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (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 21:27:57,898 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:27:57,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:27:57,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:27:57,899 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:27:57,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:27:57,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:27:57,899 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:27:57,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:27:57,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:27:57,900 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 21:27:58,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:27:58,263 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:27:58,263 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 21:27:58,264 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:27:58 BoogieIcfgContainer [2021-06-05 21:27:58,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:27:58,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:27:58,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:27:58,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:27:58,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:27:57" (1/2) ... [2021-06-05 21:27:58,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434a96e5 and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:27:58, skipping insertion in model container [2021-06-05 21:27:58,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:27:58" (2/2) ... [2021-06-05 21:27:58,269 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-06-05 21:27:58,275 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:27:58,276 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:27:58,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:27:58,278 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:27:58,316 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:27:58,333 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:27:58,356 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:27:58,356 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:27:58,356 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:27:58,356 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:27:58,357 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:27:58,357 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:27:58,357 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:27:58,357 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:27:58,365 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 21:27:58,372 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:27:58,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:58,377 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:58,378 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-06-05 21:27:58,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:58,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958578174] [2021-06-05 21:27:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:58,501 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 21:27:58,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:58,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958578174] [2021-06-05 21:27:58,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958578174] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:27:58,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:27:58,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:27:58,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889215626] [2021-06-05 21:27:58,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:27:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:58,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:27:58,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:27:58,514 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:58,542 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-05 21:27:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:27:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:27:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:58,548 INFO L225 Difference]: With dead ends: 26 [2021-06-05 21:27:58,548 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 21:27:58,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:27:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 21:27:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 21:27:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 21:27:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-05 21:27:58,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-05 21:27:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:58,567 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-05 21:27:58,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-05 21:27:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:27:58,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:58,568 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:58,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:27:58,568 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:58,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-06-05 21:27:58,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:58,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766907396] [2021-06-05 21:27:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:58,606 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 21:27:58,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766907396] [2021-06-05 21:27:58,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766907396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:27:58,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:27:58,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:27:58,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407456818] [2021-06-05 21:27:58,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:27:58,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:58,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:27:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:27:58,609 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:58,631 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 21:27:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:27:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:27:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:58,632 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:27:58,632 INFO L226 Difference]: Without dead ends: 23 [2021-06-05 21:27:58,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:27:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-05 21:27:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-05 21:27:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 21:27:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 21:27:58,636 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 21:27:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:58,636 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 21:27:58,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 21:27:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:27:58,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:58,637 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:58,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:27:58,637 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-06-05 21:27:58,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:58,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252052082] [2021-06-05 21:27:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:58,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:58,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252052082] [2021-06-05 21:27:58,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252052082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:58,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969022333] [2021-06-05 21:27:58,836 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 21:27:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:27:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:59,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:27:59,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:59,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:59,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:59,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 21:27:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969022333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:59,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:27:59,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5012191] [2021-06-05 21:27:59,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:27:59,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:59,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:27:59,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:59,097 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:59,162 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-05 21:27:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:27:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:27:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:59,164 INFO L225 Difference]: With dead ends: 30 [2021-06-05 21:27:59,164 INFO L226 Difference]: Without dead ends: 22 [2021-06-05 21:27:59,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-05 21:27:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-05 21:27:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 21:27:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 21:27:59,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 21:27:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:59,172 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 21:27:59,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 21:27:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:27:59,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:59,172 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:59,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 21:27:59,394 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-06-05 21:27:59,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:59,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401914757] [2021-06-05 21:27:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:59,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401914757] [2021-06-05 21:27:59,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401914757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896507802] [2021-06-05 21:27:59,514 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 21:27:59,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:27:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:59,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:59,631 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 15 treesize of output 37 [2021-06-05 21:27:59,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 21:27:59,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:59,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 21:27:59,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:27:59,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:27:59,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:59,718 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-06-05 21:27:59,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:27:59,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-06-05 21:27:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896507802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:59,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:27:59,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569602277] [2021-06-05 21:27:59,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:27:59,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:27:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:27:59,759 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:59,819 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-05 21:27:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:27:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:27:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:59,820 INFO L225 Difference]: With dead ends: 35 [2021-06-05 21:27:59,820 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 21:27:59,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:27:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 21:27:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-05 21:27:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 21:27:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 21:27:59,823 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 21:27:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:59,823 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 21:27:59,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 21:27:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:27:59,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:59,824 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:00,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:00,040 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-06-05 21:28:00,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:00,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886043796] [2021-06-05 21:28:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886043796] [2021-06-05 21:28:00,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886043796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394844120] [2021-06-05 21:28:00,096 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 21:28:00,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:28:00,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:28:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:00,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,216 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 15 treesize of output 37 [2021-06-05 21:28:00,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 21:28:00,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 21:28:00,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:28:00,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:28:00,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:00,310 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-06-05 21:28:00,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:00,311 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-06-05 21:28:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394844120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:00,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:28:00,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909980008] [2021-06-05 21:28:00,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:00,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:00,353 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:00,464 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-05 21:28:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:28:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:00,465 INFO L225 Difference]: With dead ends: 51 [2021-06-05 21:28:00,465 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 21:28:00,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:28:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 21:28:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-05 21:28:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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 21:28:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 21:28:00,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-05 21:28:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:00,468 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 21:28:00,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 21:28:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:28:00,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:00,468 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:00,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 21:28:00,677 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-06-05 21:28:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:00,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824605721] [2021-06-05 21:28:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:00,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824605721] [2021-06-05 21:28:00,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824605721] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:28:00,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:28:00,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:28:00,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233719080] [2021-06-05 21:28:00,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:28:00,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:00,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:28:00,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:28:00,698 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:00,719 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-05 21:28:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:28:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:28:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:00,720 INFO L225 Difference]: With dead ends: 29 [2021-06-05 21:28:00,720 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 21:28:00,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:28:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 21:28:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-05 21:28:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 21:28:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-05 21:28:00,723 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-05 21:28:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:00,723 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-05 21:28:00,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-05 21:28:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:28:00,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:00,723 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:00,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 21:28:00,724 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:00,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:00,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-06-05 21:28:00,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:00,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32657425] [2021-06-05 21:28:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:00,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32657425] [2021-06-05 21:28:00,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32657425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713755267] [2021-06-05 21:28:00,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:00,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:00,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:28:00,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:00,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 21:28:00,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:00,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:00,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:00,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 21:28:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713755267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:00,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 21:28:00,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759268127] [2021-06-05 21:28:00,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:00,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:00,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:00,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:00,983 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:01,042 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-06-05 21:28:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:28:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:01,043 INFO L225 Difference]: With dead ends: 37 [2021-06-05 21:28:01,043 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 21:28:01,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 21:28:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-06-05 21:28:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 21:28:01,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 21:28:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:01,052 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 21:28:01,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 21:28:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:28:01,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:01,053 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:01,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:01,254 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-06-05 21:28:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:01,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814894851] [2021-06-05 21:28:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814894851] [2021-06-05 21:28:01,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814894851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058594024] [2021-06-05 21:28:01,372 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 21:28:01,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:28:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:01,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:01,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 21:28:01,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:01,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 18 [2021-06-05 21:28:01,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:01,525 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:01,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:01,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-06-05 21:28:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058594024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:01,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 21:28:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335639261] [2021-06-05 21:28:01,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:01,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:01,561 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:01,644 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2021-06-05 21:28:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:28:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:28:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:01,646 INFO L225 Difference]: With dead ends: 40 [2021-06-05 21:28:01,646 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 21:28:01,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 21:28:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-06-05 21:28:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 21:28:01,648 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 21:28:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:01,649 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 21:28:01,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 21:28:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:28:01,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:01,649 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:01,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 21:28:01,850 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:01,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-06-05 21:28:01,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:01,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172962633] [2021-06-05 21:28:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:01,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172962633] [2021-06-05 21:28:01,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172962633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879194421] [2021-06-05 21:28:01,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:01,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:28:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 21:28:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:02,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:02,082 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 17 treesize of output 37 [2021-06-05 21:28:02,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:02,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:02,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 21:28:02,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:02,119 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:28:02,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:02,120 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-06-05 21:28:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879194421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:02,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 21:28:02,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531323279] [2021-06-05 21:28:02,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:02,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:02,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:02,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:02,149 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:02,283 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-06-05 21:28:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:02,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:28:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:02,284 INFO L225 Difference]: With dead ends: 61 [2021-06-05 21:28:02,284 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 21:28:02,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 21:28:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-06-05 21:28:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 21:28:02,287 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 21:28:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:02,287 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 21:28:02,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 21:28:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:28:02,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:02,288 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:02,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:02,501 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:02,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-06-05 21:28:02,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:02,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495017332] [2021-06-05 21:28:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:02,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495017332] [2021-06-05 21:28:02,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495017332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701289735] [2021-06-05 21:28:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order 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 21:28:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 21:28:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701289735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:02,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 21:28:02,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964973411] [2021-06-05 21:28:02,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:28:02,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:02,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:28:02,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:28:02,604 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:02,632 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-06-05 21:28:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:28:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:28:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:02,635 INFO L225 Difference]: With dead ends: 59 [2021-06-05 21:28:02,635 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 21:28:02,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:28:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 21:28:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-06-05 21:28:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-06-05 21:28:02,638 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-06-05 21:28:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:02,638 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-06-05 21:28:02,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-06-05 21:28:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:28:02,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:02,638 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:02,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:02,853 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-06-05 21:28:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:02,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795725850] [2021-06-05 21:28:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:02,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795725850] [2021-06-05 21:28:02,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795725850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554236191] [2021-06-05 21:28:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:02,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:02,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 21:28:02,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554236191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:02,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 21:28:02,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344201053] [2021-06-05 21:28:02,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:28:02,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:02,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:28:02,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:28:02,951 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:02,984 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-06-05 21:28:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:28:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:02,985 INFO L225 Difference]: With dead ends: 43 [2021-06-05 21:28:02,985 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 21:28:02,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 21:28:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-06-05 21:28:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-06-05 21:28:02,988 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-06-05 21:28:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:02,988 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-06-05 21:28:02,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-06-05 21:28:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:28:02,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:02,988 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:03,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 21:28:03,202 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:03,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-06-05 21:28:03,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:03,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076719598] [2021-06-05 21:28:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:03,268 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 21:28:03,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:03,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076719598] [2021-06-05 21:28:03,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076719598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642541070] [2021-06-05 21:28:03,268 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:28:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:28:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:03,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:28:03,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:03,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:03,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:03,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:28:03,435 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 21:28:03,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642541070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:03,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 21:28:03,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637592486] [2021-06-05 21:28:03,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:03,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:03,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:03,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:03,437 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:03,501 INFO L93 Difference]: Finished difference Result 44 states and 87 transitions. [2021-06-05 21:28:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:28:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:03,502 INFO L225 Difference]: With dead ends: 44 [2021-06-05 21:28:03,502 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 21:28:03,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 21:28:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-05 21:28:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-06-05 21:28:03,504 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-06-05 21:28:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:03,504 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-06-05 21:28:03,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-06-05 21:28:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:28:03,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:03,505 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:03,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,721 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-06-05 21:28:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:03,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603042818] [2021-06-05 21:28:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:03,785 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 21:28:03,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:03,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603042818] [2021-06-05 21:28:03,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603042818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022091900] [2021-06-05 21:28:03,786 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 21:28:03,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:28:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:03,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:03,920 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 19 treesize of output 37 [2021-06-05 21:28:03,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:03,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:03,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:03,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:28:03,936 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 21:28:03,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022091900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:03,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 21:28:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614384410] [2021-06-05 21:28:03,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:03,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:03,938 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:04,019 INFO L93 Difference]: Finished difference Result 55 states and 100 transitions. [2021-06-05 21:28:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:04,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:28:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:04,021 INFO L225 Difference]: With dead ends: 55 [2021-06-05 21:28:04,021 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 21:28:04,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:28:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 21:28:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-06-05 21:28:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-06-05 21:28:04,027 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-06-05 21:28:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:04,027 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-06-05 21:28:04,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-06-05 21:28:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:28:04,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:04,027 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:04,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:04,246 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-06-05 21:28:04,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:04,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548785115] [2021-06-05 21:28:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:04,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548785115] [2021-06-05 21:28:04,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548785115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204788048] [2021-06-05 21:28:04,274 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 21:28:04,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:28:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:04,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:28:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204788048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:04,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:28:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639755017] [2021-06-05 21:28:04,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:28:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:28:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:28:04,339 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:04,366 INFO L93 Difference]: Finished difference Result 85 states and 153 transitions. [2021-06-05 21:28:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:04,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:28:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:04,367 INFO L225 Difference]: With dead ends: 85 [2021-06-05 21:28:04,367 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 21:28:04,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 21:28:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-06-05 21:28:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-06-05 21:28:04,369 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-06-05 21:28:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:04,369 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-06-05 21:28:04,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-06-05 21:28:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:28:04,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:04,370 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:04,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 21:28:04,588 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-06-05 21:28:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:04,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046394293] [2021-06-05 21:28:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:04,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046394293] [2021-06-05 21:28:04,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046394293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094245998] [2021-06-05 21:28:04,607 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 21:28:04,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:28:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094245998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:04,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:28:04,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115001234] [2021-06-05 21:28:04,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:28:04,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:28:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:28:04,667 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:04,707 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-06-05 21:28:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:28:04,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:28:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:04,708 INFO L225 Difference]: With dead ends: 65 [2021-06-05 21:28:04,708 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 21:28:04,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 21:28:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-06-05 21:28:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-06-05 21:28:04,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-06-05 21:28:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:04,710 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-06-05 21:28:04,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-06-05 21:28:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:28:04,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:04,711 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:04,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:04,921 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-06-05 21:28:04,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:04,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175731443] [2021-06-05 21:28:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:04,958 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 21:28:04,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:04,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175731443] [2021-06-05 21:28:04,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175731443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84243976] [2021-06-05 21:28:04,958 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 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 21:28:04,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:04,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:28:04,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:05,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:05,085 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 19 treesize of output 37 [2021-06-05 21:28:05,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:05,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:05,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:05,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:28:05,100 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 21:28:05,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84243976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:05,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 21:28:05,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365718473] [2021-06-05 21:28:05,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:28:05,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:05,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:28:05,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:05,101 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:05,198 INFO L93 Difference]: Finished difference Result 78 states and 134 transitions. [2021-06-05 21:28:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:28:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:05,199 INFO L225 Difference]: With dead ends: 78 [2021-06-05 21:28:05,199 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 21:28:05,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 21:28:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-06-05 21:28:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-06-05 21:28:05,203 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-06-05 21:28:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:05,203 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-06-05 21:28:05,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-06-05 21:28:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:28:05,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:05,203 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:05,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 21:28:05,417 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-06-05 21:28:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:05,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989652917] [2021-06-05 21:28:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:05,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989652917] [2021-06-05 21:28:05,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989652917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337789033] [2021-06-05 21:28:05,442 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 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 21:28:05,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:05,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:28:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337789033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:05,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 21:28:05,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362234793] [2021-06-05 21:28:05,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:28:05,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:28:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:28:05,516 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:05,556 INFO L93 Difference]: Finished difference Result 65 states and 130 transitions. [2021-06-05 21:28:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:28:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:05,556 INFO L225 Difference]: With dead ends: 65 [2021-06-05 21:28:05,556 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 21:28:05,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 21:28:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-06-05 21:28:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-06-05 21:28:05,559 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-06-05 21:28:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:05,559 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-06-05 21:28:05,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-06-05 21:28:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:05,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:05,560 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:05,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:05,778 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-06-05 21:28:05,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:05,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82545386] [2021-06-05 21:28:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:05,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:05,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82545386] [2021-06-05 21:28:05,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82545386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964542124] [2021-06-05 21:28:05,816 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 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 21:28:05,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:05,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:05,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964542124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:05,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:05,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849645447] [2021-06-05 21:28:05,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:05,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:05,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:05,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:05,871 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:05,910 INFO L93 Difference]: Finished difference Result 84 states and 148 transitions. [2021-06-05 21:28:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:28:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:05,910 INFO L225 Difference]: With dead ends: 84 [2021-06-05 21:28:05,910 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:28:05,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:28:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-06-05 21:28:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-06-05 21:28:05,912 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-06-05 21:28:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:05,913 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-06-05 21:28:05,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-06-05 21:28:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:05,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:05,913 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:06,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:06,129 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-06-05 21:28:06,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:06,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677905898] [2021-06-05 21:28:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:06,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677905898] [2021-06-05 21:28:06,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677905898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970958031] [2021-06-05 21:28:06,151 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 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 21:28:06,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:06,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970958031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:06,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:06,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450511004] [2021-06-05 21:28:06,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:06,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:06,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:06,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:06,205 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:06,275 INFO L93 Difference]: Finished difference Result 106 states and 189 transitions. [2021-06-05 21:28:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:28:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:06,276 INFO L225 Difference]: With dead ends: 106 [2021-06-05 21:28:06,276 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:28:06,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:28:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-06-05 21:28:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-06-05 21:28:06,278 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-06-05 21:28:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:06,278 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-06-05 21:28:06,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-06-05 21:28:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:06,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:06,279 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:06,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:06,489 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-06-05 21:28:06,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:06,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845646058] [2021-06-05 21:28:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845646058] [2021-06-05 21:28:06,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845646058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533669960] [2021-06-05 21:28:06,513 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 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 21:28:06,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:06,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533669960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:06,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502911071] [2021-06-05 21:28:06,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:06,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:06,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:06,571 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:06,626 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2021-06-05 21:28:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:06,627 INFO L225 Difference]: With dead ends: 60 [2021-06-05 21:28:06,627 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 21:28:06,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 21:28:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-06-05 21:28:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-06-05 21:28:06,635 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-06-05 21:28:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:06,635 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-06-05 21:28:06,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-06-05 21:28:06,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:06,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:06,639 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:06,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 21:28:06,845 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-06-05 21:28:06,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:06,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193337299] [2021-06-05 21:28:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193337299] [2021-06-05 21:28:06,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193337299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69245627] [2021-06-05 21:28:06,883 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 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 21:28:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69245627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:06,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:06,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334248718] [2021-06-05 21:28:06,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:06,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:06,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:06,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:06,962 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:06,998 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2021-06-05 21:28:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:28:06,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:06,999 INFO L225 Difference]: With dead ends: 94 [2021-06-05 21:28:06,999 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 21:28:06,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 21:28:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-06-05 21:28:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-06-05 21:28:07,000 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-06-05 21:28:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:07,001 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-06-05 21:28:07,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-06-05 21:28:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:07,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:07,001 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:07,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 21:28:07,221 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-06-05 21:28:07,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:07,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781554857] [2021-06-05 21:28:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:07,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:07,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781554857] [2021-06-05 21:28:07,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781554857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132364866] [2021-06-05 21:28:07,247 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 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 21:28:07,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:07,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:07,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:07,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:07,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132364866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:07,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:07,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918773953] [2021-06-05 21:28:07,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:07,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:07,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:07,318 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:07,385 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2021-06-05 21:28:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:07,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:07,390 INFO L225 Difference]: With dead ends: 59 [2021-06-05 21:28:07,390 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 21:28:07,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 21:28:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-06-05 21:28:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-06-05 21:28:07,397 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-06-05 21:28:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:07,398 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-06-05 21:28:07,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-06-05 21:28:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:07,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:07,398 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:07,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 21:28:07,617 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-06-05 21:28:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459156771] [2021-06-05 21:28:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:07,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459156771] [2021-06-05 21:28:07,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459156771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974252099] [2021-06-05 21:28:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:07,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:07,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974252099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:07,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:07,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866905184] [2021-06-05 21:28:07,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:07,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:07,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:07,716 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:07,782 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-06-05 21:28:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:07,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:07,797 INFO L225 Difference]: With dead ends: 91 [2021-06-05 21:28:07,797 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:28:07,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:28:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:28:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-06-05 21:28:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-06-05 21:28:07,801 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-06-05 21:28:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:07,801 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-06-05 21:28:07,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-06-05 21:28:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:07,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:07,801 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:08,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 21:28:08,017 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-06-05 21:28:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:08,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014469057] [2021-06-05 21:28:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:08,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014469057] [2021-06-05 21:28:08,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014469057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381657231] [2021-06-05 21:28:08,040 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) [2021-06-05 21:28:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381657231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:08,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:08,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242076647] [2021-06-05 21:28:08,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:08,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:08,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:08,086 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:08,119 INFO L93 Difference]: Finished difference Result 62 states and 119 transitions. [2021-06-05 21:28:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:08,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:08,120 INFO L225 Difference]: With dead ends: 62 [2021-06-05 21:28:08,120 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 21:28:08,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 21:28:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-06-05 21:28:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-05 21:28:08,121 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-05 21:28:08,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:08,122 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-05 21:28:08,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-05 21:28:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:08,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:08,122 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:08,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 21:28:08,338 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:08,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-06-05 21:28:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:08,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176599551] [2021-06-05 21:28:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176599551] [2021-06-05 21:28:08,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176599551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37683653] [2021-06-05 21:28:08,359 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 21:28:08,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:08,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:08,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37683653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:08,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:08,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186458835] [2021-06-05 21:28:08,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:08,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:08,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:08,429 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:08,490 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-06-05 21:28:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:08,492 INFO L225 Difference]: With dead ends: 88 [2021-06-05 21:28:08,492 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 21:28:08,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:28:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 21:28:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-06-05 21:28:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-05 21:28:08,494 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-05 21:28:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:08,494 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-05 21:28:08,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-05 21:28:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:08,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:08,494 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:08,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:08,701 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-06-05 21:28:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:08,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934901290] [2021-06-05 21:28:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:08,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934901290] [2021-06-05 21:28:08,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934901290] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:28:08,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:28:08,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:28:08,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989734737] [2021-06-05 21:28:08,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:28:08,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:28:08,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:28:08,734 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:08,749 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2021-06-05 21:28:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:28:08,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:28:08,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:08,750 INFO L225 Difference]: With dead ends: 53 [2021-06-05 21:28:08,750 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 21:28:08,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:28:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 21:28:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-06-05 21:28:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-06-05 21:28:08,751 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-06-05 21:28:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:08,751 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-06-05 21:28:08,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-06-05 21:28:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:28:08,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:08,751 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:08,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-05 21:28:08,751 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:08,752 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-06-05 21:28:08,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:08,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472030279] [2021-06-05 21:28:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472030279] [2021-06-05 21:28:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472030279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765700279] [2021-06-05 21:28:08,776 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 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 21:28:08,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:28:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765700279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:08,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:28:08,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601175615] [2021-06-05 21:28:08,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:28:08,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:28:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:28:08,840 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:28:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:08,893 INFO L93 Difference]: Finished difference Result 91 states and 185 transitions. [2021-06-05 21:28:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:08,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 14 [2021-06-05 21:28:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:08,894 INFO L225 Difference]: With dead ends: 91 [2021-06-05 21:28:08,894 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:28:08,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:28:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:28:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-06-05 21:28:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-06-05 21:28:08,896 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-06-05 21:28:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:08,896 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-06-05 21:28:08,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:28:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-06-05 21:28:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:08,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:08,897 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:09,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:09,112 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-06-05 21:28:09,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:09,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433038305] [2021-06-05 21:28:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:09,178 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 21:28:09,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:09,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433038305] [2021-06-05 21:28:09,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433038305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:09,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469882111] [2021-06-05 21:28:09,178 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 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 21:28:09,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:09,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:09,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 21:28:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:09,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:09,375 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:09,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:09,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:09,395 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 21:28:09,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:09,400 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 21:28:09,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469882111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:09,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:09,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:09,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576070140] [2021-06-05 21:28:09,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:09,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:09,401 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:09,539 INFO L93 Difference]: Finished difference Result 66 states and 137 transitions. [2021-06-05 21:28:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:28:09,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:09,539 INFO L225 Difference]: With dead ends: 66 [2021-06-05 21:28:09,539 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 21:28:09,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 21:28:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-06-05 21:28:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-06-05 21:28:09,541 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-06-05 21:28:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:09,541 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-06-05 21:28:09,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-06-05 21:28:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:09,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:09,541 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:09,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:09,757 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-06-05 21:28:09,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:09,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462925119] [2021-06-05 21:28:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:09,825 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 21:28:09,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:09,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462925119] [2021-06-05 21:28:09,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462925119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:09,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358765226] [2021-06-05 21:28:09,825 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 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 21:28:09,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:10,219 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 44 [2021-06-05 21:28:10,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:10,250 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:10,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:10,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:10,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:10,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:10,272 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 21:28:10,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358765226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:10,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:10,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:10,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660121274] [2021-06-05 21:28:10,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:10,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:10,273 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:10,465 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-06-05 21:28:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:10,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:10,465 INFO L225 Difference]: With dead ends: 83 [2021-06-05 21:28:10,465 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 21:28:10,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 21:28:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 21:28:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-06-05 21:28:10,467 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-06-05 21:28:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:10,467 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-06-05 21:28:10,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-06-05 21:28:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:10,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:10,467 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:10,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 21:28:10,681 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-06-05 21:28:10,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:10,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120575063] [2021-06-05 21:28:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:10,739 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 21:28:10,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:10,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120575063] [2021-06-05 21:28:10,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120575063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:10,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955044809] [2021-06-05 21:28:10,740 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 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 21:28:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:10,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:10,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:10,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:10,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:10,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:11,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:11,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:11,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:11,018 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:11,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:11,049 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:11,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:11,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:11,072 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 21:28:11,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955044809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:11,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:11,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332318045] [2021-06-05 21:28:11,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:11,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:11,074 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:11,271 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-06-05 21:28:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:11,272 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:28:11,272 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:28:11,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:28:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-06-05 21:28:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-06-05 21:28:11,274 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-06-05 21:28:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:11,274 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-06-05 21:28:11,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-06-05 21:28:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:11,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:11,274 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:11,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:11,485 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-06-05 21:28:11,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:11,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416602056] [2021-06-05 21:28:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:11,555 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 21:28:11,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416602056] [2021-06-05 21:28:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416602056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628264584] [2021-06-05 21:28:11,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:11,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:11,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:11,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:11,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:11,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:11,728 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:11,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:11,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:11,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:11,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:11,747 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 21:28:11,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628264584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:11,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:11,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070713175] [2021-06-05 21:28:11,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:11,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:11,748 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:11,934 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2021-06-05 21:28:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:11,935 INFO L225 Difference]: With dead ends: 93 [2021-06-05 21:28:11,935 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 21:28:11,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 21:28:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-06-05 21:28:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-06-05 21:28:11,937 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-06-05 21:28:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:11,937 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-06-05 21:28:11,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-06-05 21:28:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:11,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:11,937 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:12,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 21:28:12,138 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:12,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-06-05 21:28:12,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:12,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525223869] [2021-06-05 21:28:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:12,197 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 21:28:12,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:12,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525223869] [2021-06-05 21:28:12,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525223869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:12,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091109180] [2021-06-05 21:28:12,197 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 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 21:28:12,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:12,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:12,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:12,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:12,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:12,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:12,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:12,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:12,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:12,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:12,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:12,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:12,491 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:12,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:12,521 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:12,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:12,521 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:12,544 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 21:28:12,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091109180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:12,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:12,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:12,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108264435] [2021-06-05 21:28:12,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:12,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:12,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:12,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:12,545 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:12,790 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2021-06-05 21:28:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:12,790 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:12,791 INFO L225 Difference]: With dead ends: 119 [2021-06-05 21:28:12,791 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:28:12,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:28:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-06-05 21:28:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-06-05 21:28:12,797 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-06-05 21:28:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:12,797 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-06-05 21:28:12,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-06-05 21:28:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:12,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:12,798 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:13,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:13,001 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-06-05 21:28:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:13,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204923437] [2021-06-05 21:28:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:13,058 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 21:28:13,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:13,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204923437] [2021-06-05 21:28:13,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204923437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831670999] [2021-06-05 21:28:13,058 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 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 21:28:13,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:13,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:13,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:13,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:13,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:13,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:13,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:13,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:13,320 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:13,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:13,347 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:13,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:13,347 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:13,367 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 21:28:13,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831670999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:13,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:13,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739489633] [2021-06-05 21:28:13,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:13,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:13,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:13,368 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:13,564 INFO L93 Difference]: Finished difference Result 98 states and 230 transitions. [2021-06-05 21:28:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:13,565 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:28:13,565 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 21:28:13,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 21:28:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-06-05 21:28:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-06-05 21:28:13,567 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-06-05 21:28:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:13,567 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-06-05 21:28:13,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-06-05 21:28:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:13,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:13,567 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:13,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 21:28:13,777 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-06-05 21:28:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:13,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965302401] [2021-06-05 21:28:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:13,844 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 21:28:13,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:13,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965302401] [2021-06-05 21:28:13,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965302401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54887691] [2021-06-05 21:28:13,845 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 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 21:28:13,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:14,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:14,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:14,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:14,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:14,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:14,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:14,068 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 21:28:14,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54887691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:14,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:14,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:14,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465214462] [2021-06-05 21:28:14,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:14,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:14,070 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:14,223 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-06-05 21:28:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:14,224 INFO L225 Difference]: With dead ends: 100 [2021-06-05 21:28:14,224 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 21:28:14,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 21:28:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-06-05 21:28:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 21:28:14,226 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 21:28:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:14,226 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 21:28:14,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 21:28:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:14,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:14,226 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:14,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:14,441 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:14,441 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-06-05 21:28:14,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:14,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211168694] [2021-06-05 21:28:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:14,497 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 21:28:14,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:14,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211168694] [2021-06-05 21:28:14,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211168694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:14,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748175707] [2021-06-05 21:28:14,497 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 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 21:28:14,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:14,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:14,737 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 44 [2021-06-05 21:28:14,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:14,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:14,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:14,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:14,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:14,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:14,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:14,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:14,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:14,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:14,891 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:14,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:14,892 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:14,915 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 21:28:14,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748175707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:14,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:14,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:14,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793749859] [2021-06-05 21:28:14,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:14,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:14,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:14,916 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:15,117 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-06-05 21:28:15,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:15,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:15,118 INFO L225 Difference]: With dead ends: 120 [2021-06-05 21:28:15,118 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:28:15,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:28:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-06-05 21:28:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 21:28:15,120 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 21:28:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:15,120 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 21:28:15,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 21:28:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:15,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:15,120 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:15,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 21:28:15,329 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-06-05 21:28:15,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:15,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582347132] [2021-06-05 21:28:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:15,393 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 21:28:15,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:15,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582347132] [2021-06-05 21:28:15,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582347132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:15,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987891952] [2021-06-05 21:28:15,394 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 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 21:28:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:15,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:15,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:15,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:15,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:15,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:15,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:15,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:15,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:15,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:15,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:15,686 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:15,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:15,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:15,707 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 21:28:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987891952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:15,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:15,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878956651] [2021-06-05 21:28:15,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:15,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:15,708 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:15,938 INFO L93 Difference]: Finished difference Result 104 states and 252 transitions. [2021-06-05 21:28:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:15,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:15,939 INFO L225 Difference]: With dead ends: 104 [2021-06-05 21:28:15,939 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 21:28:15,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 21:28:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-06-05 21:28:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 21:28:15,941 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 21:28:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:15,942 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 21:28:15,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 21:28:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:15,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:15,942 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:16,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 21:28:16,157 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-06-05 21:28:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:16,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987749477] [2021-06-05 21:28:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:16,209 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 21:28:16,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:16,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987749477] [2021-06-05 21:28:16,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987749477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926405891] [2021-06-05 21:28:16,210 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 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 21:28:16,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:16,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:16,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:16,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:16,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:16,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:16,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:16,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:16,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:16,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:16,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:16,526 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:16,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:16,564 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:16,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:16,565 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:16,590 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 21:28:16,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926405891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:16,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117922430] [2021-06-05 21:28:16,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:16,591 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:16,880 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2021-06-05 21:28:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:16,881 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:28:16,881 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:28:16,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:28:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-06-05 21:28:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 21:28:16,883 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 21:28:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:16,883 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 21:28:16,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 21:28:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:16,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:16,884 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:17,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 21:28:17,097 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-06-05 21:28:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:17,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850132306] [2021-06-05 21:28:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:17,159 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 21:28:17,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850132306] [2021-06-05 21:28:17,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850132306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057034849] [2021-06-05 21:28:17,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:17,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:28:17,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:17,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:17,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:17,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:17,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:17,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:17,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:17,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:17,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:17,413 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 21:28:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057034849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306918317] [2021-06-05 21:28:17,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:17,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:17,415 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:17,577 INFO L93 Difference]: Finished difference Result 107 states and 266 transitions. [2021-06-05 21:28:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:17,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:17,578 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:28:17,578 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 21:28:17,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 21:28:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-06-05 21:28:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 21:28:17,580 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 21:28:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:17,580 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 21:28:17,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 21:28:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:17,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:17,581 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:17,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 21:28:17,785 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-06-05 21:28:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:17,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088507799] [2021-06-05 21:28:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:17,842 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 21:28:17,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088507799] [2021-06-05 21:28:17,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088507799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823372689] [2021-06-05 21:28:17,843 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 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 21:28:17,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:18,101 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 2072 DAG size of output: 44 [2021-06-05 21:28:18,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:18,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:18,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:18,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:18,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:18,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:18,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:18,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:18,230 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:18,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:18,259 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:18,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:18,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:18,283 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 21:28:18,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823372689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:18,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:18,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:18,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95534149] [2021-06-05 21:28:18,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:18,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:18,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:18,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:18,283 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:18,568 INFO L93 Difference]: Finished difference Result 129 states and 314 transitions. [2021-06-05 21:28:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:18,569 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:28:18,569 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 21:28:18,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 21:28:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-06-05 21:28:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 21:28:18,571 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 21:28:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:18,572 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 21:28:18,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 21:28:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:18,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:18,572 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:18,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:18,785 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-06-05 21:28:18,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:18,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731446240] [2021-06-05 21:28:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:18,848 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 21:28:18,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731446240] [2021-06-05 21:28:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731446240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042336971] [2021-06-05 21:28:18,848 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:28:18,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:18,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:19,852 WARN L205 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 45 [2021-06-05 21:28:19,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:19,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:19,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:19,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:19,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:19,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:19,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:20,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:20,006 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:20,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:20,052 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:20,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:20,053 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:20,075 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 21:28:20,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042336971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:20,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:20,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:20,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215686445] [2021-06-05 21:28:20,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:20,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:20,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:20,076 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:20,293 INFO L93 Difference]: Finished difference Result 111 states and 280 transitions. [2021-06-05 21:28:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:20,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:20,294 INFO L225 Difference]: With dead ends: 111 [2021-06-05 21:28:20,294 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:28:20,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:28:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-06-05 21:28:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 21:28:20,296 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 21:28:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:20,296 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 21:28:20,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 21:28:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:20,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:20,296 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:20,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 21:28:20,513 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-06-05 21:28:20,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:20,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127703045] [2021-06-05 21:28:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:20,570 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 21:28:20,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:20,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127703045] [2021-06-05 21:28:20,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127703045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:20,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068939433] [2021-06-05 21:28:20,571 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 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 21:28:20,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:20,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:20,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:20,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:20,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:20,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:20,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:20,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:20,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:20,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:20,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:20,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:20,848 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:20,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:20,849 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:20,871 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 21:28:20,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068939433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:20,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:20,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:20,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219388531] [2021-06-05 21:28:20,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:20,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:20,872 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:21,158 INFO L93 Difference]: Finished difference Result 125 states and 307 transitions. [2021-06-05 21:28:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:21,159 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:28:21,159 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:28:21,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:28:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-06-05 21:28:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 21:28:21,162 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 21:28:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:21,162 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 21:28:21,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 21:28:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:21,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:21,162 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:21,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 21:28:21,375 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:21,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:21,376 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-06-05 21:28:21,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:21,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43843315] [2021-06-05 21:28:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:21,435 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 21:28:21,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:21,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43843315] [2021-06-05 21:28:21,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43843315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:21,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002657709] [2021-06-05 21:28:21,436 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 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 21:28:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:21,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:21,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:21,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:21,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:21,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:21,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:21,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:21,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:21,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:21,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:21,720 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:21,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:21,765 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:21,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:21,766 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:21,787 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 21:28:21,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002657709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:21,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:21,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591206657] [2021-06-05 21:28:21,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:21,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:21,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:21,788 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:22,117 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2021-06-05 21:28:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:22,118 INFO L225 Difference]: With dead ends: 139 [2021-06-05 21:28:22,118 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:28:22,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:28:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:28:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-06-05 21:28:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 21:28:22,120 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 21:28:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:22,120 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 21:28:22,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 21:28:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:22,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:22,121 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:22,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 21:28:22,336 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-06-05 21:28:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:22,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918822569] [2021-06-05 21:28:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:22,402 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 21:28:22,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:22,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918822569] [2021-06-05 21:28:22,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918822569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:22,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788117121] [2021-06-05 21:28:22,402 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 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 21:28:22,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:22,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:22,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:22,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:22,566 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:22,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:22,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:22,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:22,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:28:22,596 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 21:28:22,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788117121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:22,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:22,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:22,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142408499] [2021-06-05 21:28:22,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:22,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:22,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:22,597 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:22,762 INFO L93 Difference]: Finished difference Result 117 states and 300 transitions. [2021-06-05 21:28:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:22,769 INFO L225 Difference]: With dead ends: 117 [2021-06-05 21:28:22,769 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:28:22,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:28:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-06-05 21:28:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 21:28:22,771 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 21:28:22,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:22,771 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 21:28:22,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 21:28:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:22,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:22,772 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:22,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 21:28:22,988 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:22,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:22,988 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-06-05 21:28:22,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:22,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127568783] [2021-06-05 21:28:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:23,043 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 21:28:23,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:23,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127568783] [2021-06-05 21:28:23,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127568783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956188217] [2021-06-05 21:28:23,044 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 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 21:28:23,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:23,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:23,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:23,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:23,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:23,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:23,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:23,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:23,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:23,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:23,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:23,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:23,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:23,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:23,406 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:23,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:23,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:23,436 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 21:28:23,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956188217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:23,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:23,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:23,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784634785] [2021-06-05 21:28:23,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:23,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:23,437 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:23,744 INFO L93 Difference]: Finished difference Result 141 states and 356 transitions. [2021-06-05 21:28:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:23,745 INFO L225 Difference]: With dead ends: 141 [2021-06-05 21:28:23,745 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:28:23,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:28:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-06-05 21:28:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 21:28:23,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 21:28:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:23,748 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 21:28:23,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 21:28:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:23,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:23,748 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:23,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:23,964 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:23,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-06-05 21:28:23,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:23,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109861490] [2021-06-05 21:28:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:24,024 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 21:28:24,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:24,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109861490] [2021-06-05 21:28:24,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109861490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:24,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886294151] [2021-06-05 21:28:24,024 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 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 21:28:24,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:24,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:24,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:24,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:24,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:24,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:24,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:24,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:24,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:24,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:24,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:24,290 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:24,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:24,317 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:24,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:24,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:24,340 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 21:28:24,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886294151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:24,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:24,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:24,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257516461] [2021-06-05 21:28:24,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:24,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:24,341 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:24,537 INFO L93 Difference]: Finished difference Result 128 states and 330 transitions. [2021-06-05 21:28:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:24,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:24,538 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:28:24,538 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:28:24,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:28:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-06-05 21:28:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 21:28:24,540 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 21:28:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:24,540 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 21:28:24,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 21:28:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:24,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:24,540 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:24,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:24,757 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-06-05 21:28:24,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:24,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669712886] [2021-06-05 21:28:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:24,813 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 21:28:24,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:24,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669712886] [2021-06-05 21:28:24,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669712886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:24,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311896432] [2021-06-05 21:28:24,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:24,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:28:24,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:24,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:24,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:25,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:25,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:25,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:25,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:25,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:25,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:25,063 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:25,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:25,094 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:25,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:25,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:25,114 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 21:28:25,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311896432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:25,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:25,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528228645] [2021-06-05 21:28:25,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:25,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:25,116 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:25,383 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2021-06-05 21:28:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:25,384 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:28:25,384 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 21:28:25,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 21:28:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-06-05 21:28:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 21:28:25,386 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 21:28:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:25,386 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 21:28:25,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 21:28:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:25,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:25,387 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:25,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:25,603 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-06-05 21:28:25,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:25,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285455427] [2021-06-05 21:28:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:25,662 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 21:28:25,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285455427] [2021-06-05 21:28:25,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285455427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594509709] [2021-06-05 21:28:25,662 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 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 21:28:25,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:25,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:25,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:25,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:25,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:25,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:25,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:25,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:25,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:25,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:25,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:25,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:25,945 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:25,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:25,971 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:25,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:25,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:25,994 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 21:28:25,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594509709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:25,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:25,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104381701] [2021-06-05 21:28:25,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:25,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:25,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:25,995 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:26,354 INFO L93 Difference]: Finished difference Result 154 states and 387 transitions. [2021-06-05 21:28:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:26,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:26,354 INFO L225 Difference]: With dead ends: 154 [2021-06-05 21:28:26,354 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 21:28:26,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 21:28:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-06-05 21:28:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 21:28:26,357 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 21:28:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:26,357 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 21:28:26,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 21:28:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:28:26,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:26,357 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:26,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:26,573 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-06-05 21:28:26,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:26,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572555331] [2021-06-05 21:28:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:26,630 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 21:28:26,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:26,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572555331] [2021-06-05 21:28:26,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572555331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:26,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851600932] [2021-06-05 21:28:26,631 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 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 21:28:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:28:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:26,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:26,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 21:28:26,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:26,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:26,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:26,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:28:26,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:26,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:26,948 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:28:26,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:26,972 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 21:28:26,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:26,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 21:28:26,993 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 21:28:26,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851600932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:26,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:26,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 21:28:26,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152367986] [2021-06-05 21:28:26,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:26,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:26,994 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:27,385 INFO L93 Difference]: Finished difference Result 159 states and 400 transitions. [2021-06-05 21:28:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:28:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:27,386 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:28:27,386 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:28:27,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:28:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-06-05 21:28:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-06-05 21:28:27,388 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-06-05 21:28:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:27,389 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-06-05 21:28:27,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-06-05 21:28:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:27,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:27,389 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:27,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-06-05 21:28:27,597 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-06-05 21:28:27,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:27,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743689871] [2021-06-05 21:28:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:27,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:27,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743689871] [2021-06-05 21:28:27,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743689871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:27,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190952162] [2021-06-05 21:28:27,683 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 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 21:28:27,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:27,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:27,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:27,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:27,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:27,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:27,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:27,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:27,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:27,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190952162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:27,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:27,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:27,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734480379] [2021-06-05 21:28:27,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:27,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:27,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:27,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:27,989 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:28,193 INFO L93 Difference]: Finished difference Result 123 states and 314 transitions. [2021-06-05 21:28:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:28,194 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:28:28,194 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 21:28:28,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:28:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 21:28:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-06-05 21:28:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-06-05 21:28:28,196 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-06-05 21:28:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:28,196 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-06-05 21:28:28,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-06-05 21:28:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:28,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:28,197 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:28,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:28,397 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-06-05 21:28:28,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:28,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865214373] [2021-06-05 21:28:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:28,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865214373] [2021-06-05 21:28:28,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865214373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552307118] [2021-06-05 21:28:28,486 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 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 21:28:28,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:28,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:28,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:28,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:28,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:28,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:28,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:28,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:28,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552307118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:28,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:28,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799180899] [2021-06-05 21:28:28,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:28,755 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:29,031 INFO L93 Difference]: Finished difference Result 118 states and 307 transitions. [2021-06-05 21:28:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:29,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:29,032 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:28:29,032 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 21:28:29,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 21:28:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-06-05 21:28:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-06-05 21:28:29,034 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-06-05 21:28:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:29,034 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-06-05 21:28:29,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-06-05 21:28:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:29,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:29,035 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:29,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-06-05 21:28:29,245 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-06-05 21:28:29,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:29,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338711894] [2021-06-05 21:28:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:29,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:29,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338711894] [2021-06-05 21:28:29,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338711894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:29,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453826814] [2021-06-05 21:28:29,330 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 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 21:28:29,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:29,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:29,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:29,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:29,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:29,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:29,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:29,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:29,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:29,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:30,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:30,131 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:30,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:30,132 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:30,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453826814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:30,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:30,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:30,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663878381] [2021-06-05 21:28:30,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:30,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:30,158 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:30,396 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2021-06-05 21:28:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:30,396 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:28:30,397 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 21:28:30,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 21:28:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-06-05 21:28:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-06-05 21:28:30,399 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-06-05 21:28:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:30,399 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-06-05 21:28:30,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-06-05 21:28:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:30,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:30,399 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:30,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:30,615 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-06-05 21:28:30,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:30,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42300908] [2021-06-05 21:28:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:30,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:30,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42300908] [2021-06-05 21:28:30,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42300908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:30,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215405792] [2021-06-05 21:28:30,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:30,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:30,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:30,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:30,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:30,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:30,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:30,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:30,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:31,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:31,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:31,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:31,717 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 234 [2021-06-05 21:28:32,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:32,417 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:32,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:32,418 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215405792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:32,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:32,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 21:28:32,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795781463] [2021-06-05 21:28:32,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:32,445 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:32,782 INFO L93 Difference]: Finished difference Result 156 states and 373 transitions. [2021-06-05 21:28:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:32,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:32,783 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:28:32,783 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:28:32,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:28:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-06-05 21:28:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-06-05 21:28:32,785 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-06-05 21:28:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:32,786 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-06-05 21:28:32,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-06-05 21:28:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:32,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:32,786 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:33,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 21:28:33,002 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-06-05 21:28:33,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:33,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358673112] [2021-06-05 21:28:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:33,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358673112] [2021-06-05 21:28:33,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358673112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030550443] [2021-06-05 21:28:33,034 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 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 21:28:33,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:28:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030550443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:33,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:28:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720586414] [2021-06-05 21:28:33,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:28:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:28:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:28:33,093 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:33,132 INFO L93 Difference]: Finished difference Result 216 states and 471 transitions. [2021-06-05 21:28:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:28:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:33,133 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:28:33,133 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:28:33,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:28:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-06-05 21:28:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-06-05 21:28:33,135 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-06-05 21:28:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:33,135 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-06-05 21:28:33,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-06-05 21:28:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:33,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:33,136 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:33,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 21:28:33,352 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-06-05 21:28:33,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:33,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734315618] [2021-06-05 21:28:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:33,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734315618] [2021-06-05 21:28:33,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734315618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447471557] [2021-06-05 21:28:33,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:28:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:33,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:33,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:33,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:33,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:33,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:33,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447471557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:33,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:33,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188374935] [2021-06-05 21:28:33,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:33,789 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:34,063 INFO L93 Difference]: Finished difference Result 126 states and 330 transitions. [2021-06-05 21:28:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:34,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:34,064 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:28:34,064 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 21:28:34,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 21:28:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-06-05 21:28:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 21:28:34,066 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 21:28:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:34,066 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 21:28:34,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 21:28:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:34,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:34,066 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:34,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 21:28:34,281 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-06-05 21:28:34,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:34,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689224289] [2021-06-05 21:28:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:34,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689224289] [2021-06-05 21:28:34,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689224289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609140826] [2021-06-05 21:28:34,417 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 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 21:28:34,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:34,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:34,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:34,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:34,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:34,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:34,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:35,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:35,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:35,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:35,476 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:35,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:35,477 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:35,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609140826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:35,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:35,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164313818] [2021-06-05 21:28:35,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:35,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:35,503 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:35,769 INFO L93 Difference]: Finished difference Result 150 states and 373 transitions. [2021-06-05 21:28:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:35,770 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:28:35,770 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 21:28:35,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 21:28:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-06-05 21:28:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 21:28:35,772 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 21:28:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:35,772 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 21:28:35,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 21:28:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:35,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:35,772 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:35,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-06-05 21:28:35,988 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:35,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-06-05 21:28:35,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:35,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068418311] [2021-06-05 21:28:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:36,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:36,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068418311] [2021-06-05 21:28:36,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068418311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:36,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691060368] [2021-06-05 21:28:36,066 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 21:28:36,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:36,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:36,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:36,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:36,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:36,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:36,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:36,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:36,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:36,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:36,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:37,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:37,350 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:37,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:37,351 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:37,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691060368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:37,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:37,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:37,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857307906] [2021-06-05 21:28:37,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:37,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:37,377 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:37,747 INFO L93 Difference]: Finished difference Result 171 states and 410 transitions. [2021-06-05 21:28:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:28:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:37,748 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:28:37,748 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:28:37,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:28:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:28:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-06-05 21:28:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 21:28:37,750 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 21:28:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:37,750 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 21:28:37,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 21:28:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:37,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:37,751 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:37,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 21:28:37,967 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-06-05 21:28:37,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:37,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210212442] [2021-06-05 21:28:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:38,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:38,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210212442] [2021-06-05 21:28:38,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210212442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:38,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915843318] [2021-06-05 21:28:38,041 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 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 21:28:38,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:38,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:38,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:38,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:38,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:38,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:38,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:38,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:38,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:38,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:38,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:38,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:39,201 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 279 [2021-06-05 21:28:39,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:39,985 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:39,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:39,986 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915843318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:40,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:40,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:40,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130076017] [2021-06-05 21:28:40,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:40,011 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:40,440 INFO L93 Difference]: Finished difference Result 188 states and 439 transitions. [2021-06-05 21:28:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:28:40,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:40,441 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:28:40,441 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:28:40,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:28:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-06-05 21:28:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-06-05 21:28:40,444 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-06-05 21:28:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:40,444 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-06-05 21:28:40,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-06-05 21:28:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:40,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:40,444 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:40,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-06-05 21:28:40,649 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-06-05 21:28:40,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:40,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161142696] [2021-06-05 21:28:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:40,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:40,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161142696] [2021-06-05 21:28:40,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161142696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:40,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52363272] [2021-06-05 21:28:40,679 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 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 21:28:40,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:40,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:40,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52363272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:40,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:40,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:40,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614969844] [2021-06-05 21:28:40,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:40,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:40,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:40,728 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:40,785 INFO L93 Difference]: Finished difference Result 260 states and 558 transitions. [2021-06-05 21:28:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:28:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:40,787 INFO L225 Difference]: With dead ends: 260 [2021-06-05 21:28:40,788 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 21:28:40,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:28:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 21:28:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-06-05 21:28:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-06-05 21:28:40,790 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-06-05 21:28:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:40,790 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-06-05 21:28:40,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-06-05 21:28:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:40,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:40,790 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:41,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1983 [2021-06-05 21:28:41,001 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-06-05 21:28:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304693447] [2021-06-05 21:28:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:41,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:41,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304693447] [2021-06-05 21:28:41,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304693447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:41,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387127390] [2021-06-05 21:28:41,151 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 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 21:28:41,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:41,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:41,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:41,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:41,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:41,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:41,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:41,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:41,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387127390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:41,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:41,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:41,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140071619] [2021-06-05 21:28:41,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:41,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:41,407 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:41,671 INFO L93 Difference]: Finished difference Result 136 states and 365 transitions. [2021-06-05 21:28:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:41,671 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:28:41,672 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:28:41,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:28:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-06-05 21:28:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 21:28:41,673 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 21:28:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:41,674 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 21:28:41,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 21:28:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:41,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:41,674 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:41,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:41,878 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-06-05 21:28:41,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:41,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187733451] [2021-06-05 21:28:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187733451] [2021-06-05 21:28:42,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187733451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889860125] [2021-06-05 21:28:42,021 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 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 21:28:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:42,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:42,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:42,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:42,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:42,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:42,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:42,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:42,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:43,053 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 227 [2021-06-05 21:28:44,080 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-06-05 21:28:44,209 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-06-05 21:28:44,348 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 299 [2021-06-05 21:28:44,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:44,757 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:44,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:44,758 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:44,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889860125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:44,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:44,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:44,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372821786] [2021-06-05 21:28:44,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:44,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:44,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:44,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:44,784 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:45,077 INFO L93 Difference]: Finished difference Result 163 states and 416 transitions. [2021-06-05 21:28:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:45,078 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:28:45,078 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:28:45,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:28:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-06-05 21:28:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 21:28:45,080 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 21:28:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:45,080 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 21:28:45,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 21:28:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:45,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:45,081 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:45,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2005 [2021-06-05 21:28:45,293 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-06-05 21:28:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:45,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629206356] [2021-06-05 21:28:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:45,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:45,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629206356] [2021-06-05 21:28:45,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629206356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775474202] [2021-06-05 21:28:45,379 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 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 21:28:45,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:45,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:45,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:45,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:45,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:45,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:45,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:45,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:45,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:45,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:45,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:45,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:46,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:46,837 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:46,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:46,838 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:46,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775474202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:46,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:46,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931153533] [2021-06-05 21:28:46,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:46,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:46,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:46,863 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:47,286 INFO L93 Difference]: Finished difference Result 192 states and 470 transitions. [2021-06-05 21:28:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:47,287 INFO L225 Difference]: With dead ends: 192 [2021-06-05 21:28:47,287 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 21:28:47,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 21:28:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-06-05 21:28:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 21:28:47,289 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 21:28:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:47,289 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 21:28:47,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 21:28:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:47,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:47,289 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:47,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:47,490 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:47,490 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-06-05 21:28:47,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:47,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352674052] [2021-06-05 21:28:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:47,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352674052] [2021-06-05 21:28:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352674052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39194173] [2021-06-05 21:28:47,557 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 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 21:28:47,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:47,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:47,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:47,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:47,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:47,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:47,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:47,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:48,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:48,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:48,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:48,545 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:48,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:48,546 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:48,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39194173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:48,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:48,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:48,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600665853] [2021-06-05 21:28:48,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:48,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:48,607 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:49,054 INFO L93 Difference]: Finished difference Result 205 states and 493 transitions. [2021-06-05 21:28:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:28:49,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:49,055 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:28:49,055 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 21:28:49,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:28:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 21:28:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-06-05 21:28:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 21:28:49,057 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 21:28:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:49,057 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 21:28:49,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 21:28:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:49,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:49,058 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:49,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2691 [2021-06-05 21:28:49,273 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-06-05 21:28:49,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:49,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221432074] [2021-06-05 21:28:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:49,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:49,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221432074] [2021-06-05 21:28:49,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221432074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128186693] [2021-06-05 21:28:49,360 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 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 21:28:49,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:49,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:49,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:49,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:49,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:49,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:49,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:49,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:49,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:49,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:49,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:49,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:51,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:51,140 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:51,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:51,141 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128186693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:51,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:51,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728161739] [2021-06-05 21:28:51,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:51,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:51,167 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:51,580 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-06-05 21:28:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:51,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:51,581 INFO L225 Difference]: With dead ends: 165 [2021-06-05 21:28:51,581 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 21:28:51,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 21:28:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-06-05 21:28:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-06-05 21:28:51,583 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-06-05 21:28:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:51,583 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-06-05 21:28:51,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-06-05 21:28:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:51,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:51,583 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:51,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,784 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-06-05 21:28:51,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:51,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669523806] [2021-06-05 21:28:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:51,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669523806] [2021-06-05 21:28:51,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669523806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105798346] [2021-06-05 21:28:51,826 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 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 21:28:51,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:28:51,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:28:51,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105798346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:51,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:28:51,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405042897] [2021-06-05 21:28:51,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:28:51,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:51,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:28:51,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:28:51,878 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:51,959 INFO L93 Difference]: Finished difference Result 247 states and 556 transitions. [2021-06-05 21:28:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:51,960 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:28:51,960 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 21:28:51,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 21:28:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-06-05 21:28:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-06-05 21:28:51,962 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-06-05 21:28:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:51,962 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-06-05 21:28:51,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-06-05 21:28:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:51,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:51,963 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:52,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:52,171 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:52,171 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-06-05 21:28:52,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:52,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950673133] [2021-06-05 21:28:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:52,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950673133] [2021-06-05 21:28:52,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950673133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665860848] [2021-06-05 21:28:52,319 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 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 21:28:52,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:28:52,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:52,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:52,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:52,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:52,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:52,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:52,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:52,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:28:52,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:28:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665860848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:52,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:52,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062004090] [2021-06-05 21:28:52,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:52,555 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:52,807 INFO L93 Difference]: Finished difference Result 150 states and 406 transitions. [2021-06-05 21:28:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:52,808 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:28:52,808 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 21:28:52,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 21:28:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-06-05 21:28:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 21:28:52,810 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 21:28:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:52,810 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 21:28:52,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 21:28:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:52,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:52,811 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:53,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:53,011 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:53,011 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-06-05 21:28:53,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:53,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492733991] [2021-06-05 21:28:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:53,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:53,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492733991] [2021-06-05 21:28:53,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492733991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507503783] [2021-06-05 21:28:53,147 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 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 21:28:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:53,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:53,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:53,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:53,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:53,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:53,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:53,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:53,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:53,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:54,746 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 228 [2021-06-05 21:28:54,852 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 285 [2021-06-05 21:28:55,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:55,144 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:55,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:55,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507503783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:55,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:55,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194294403] [2021-06-05 21:28:55,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:55,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:55,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:55,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:55,171 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:55,535 INFO L93 Difference]: Finished difference Result 179 states and 464 transitions. [2021-06-05 21:28:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:28:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:55,536 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:28:55,536 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 21:28:55,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:55,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 21:28:55,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-06-05 21:28:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 21:28:55,538 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 21:28:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:55,538 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 21:28:55,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 21:28:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:55,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:55,538 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:55,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-06-05 21:28:55,739 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-06-05 21:28:55,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:55,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539138199] [2021-06-05 21:28:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539138199] [2021-06-05 21:28:55,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539138199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873837813] [2021-06-05 21:28:55,824 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 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 21:28:55,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:55,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:55,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:56,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:56,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:56,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:56,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:56,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:56,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:56,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:56,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:57,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:57,043 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:57,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:57,044 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873837813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:57,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:57,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106617461] [2021-06-05 21:28:57,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:57,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:57,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:57,070 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:57,424 INFO L93 Difference]: Finished difference Result 203 states and 504 transitions. [2021-06-05 21:28:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:28:57,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:57,425 INFO L225 Difference]: With dead ends: 203 [2021-06-05 21:28:57,425 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:28:57,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:28:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:28:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-06-05 21:28:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 21:28:57,428 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 21:28:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:57,428 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 21:28:57,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 21:28:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:57,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:57,428 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:57,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:57,643 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-06-05 21:28:57,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:57,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864690523] [2021-06-05 21:28:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:57,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:57,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864690523] [2021-06-05 21:28:57,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864690523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814939603] [2021-06-05 21:28:57,727 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 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 21:28:57,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:28:57,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:57,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:28:57,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:57,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:57,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:28:57,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:28:58,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:58,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:28:58,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:58,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:28:58,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:28:59,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:28:59,119 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:28:59,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:28:59,120 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:28:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:59,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814939603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:59,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:59,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:28:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613615448] [2021-06-05 21:28:59,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:28:59,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:59,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:28:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:59,145 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:59,716 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-06-05 21:28:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:28:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:28:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:59,717 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:28:59,717 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:28:59,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:28:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:28:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-06-05 21:28:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 21:28:59,719 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 21:28:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:59,719 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 21:28:59,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 21:28:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:28:59,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:59,720 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:59,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-06-05 21:28:59,920 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-06-05 21:28:59,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:59,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589541395] [2021-06-05 21:28:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:59,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:59,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589541395] [2021-06-05 21:28:59,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589541395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:59,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83532216] [2021-06-05 21:28:59,996 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 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 21:29:00,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:00,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:00,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:00,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:00,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:00,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:00,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:00,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:00,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:00,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:00,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:00,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:00,988 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:00,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:00,989 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83532216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:01,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:01,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:01,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492899923] [2021-06-05 21:29:01,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:01,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:01,014 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:01,415 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-06-05 21:29:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:01,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:01,416 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:29:01,416 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 21:29:01,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:29:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 21:29:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-06-05 21:29:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 21:29:01,418 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 21:29:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:01,418 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 21:29:01,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 21:29:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:01,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:01,419 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:01,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-06-05 21:29:01,634 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:01,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:01,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-06-05 21:29:01,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:01,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387594899] [2021-06-05 21:29:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:01,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:01,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387594899] [2021-06-05 21:29:01,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387594899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:01,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364186652] [2021-06-05 21:29:01,703 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 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 21:29:01,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:29:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:01,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:01,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:01,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:01,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:02,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:02,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:02,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:02,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:02,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:02,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:02,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:02,814 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:02,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:02,815 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:02,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364186652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:02,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:02,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:02,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830368467] [2021-06-05 21:29:02,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:02,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:02,841 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:03,331 INFO L93 Difference]: Finished difference Result 186 states and 464 transitions. [2021-06-05 21:29:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:29:03,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:03,332 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:29:03,332 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 21:29:03,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:29:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 21:29:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-06-05 21:29:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-06-05 21:29:03,335 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-06-05 21:29:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:03,335 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-06-05 21:29:03,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-06-05 21:29:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:03,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:03,335 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:03,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-05 21:29:03,551 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-06-05 21:29:03,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:03,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785770951] [2021-06-05 21:29:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:03,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:03,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785770951] [2021-06-05 21:29:03,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785770951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:03,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425434794] [2021-06-05 21:29:03,579 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 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 21:29:03,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:29:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:29:03,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:03,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425434794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:03,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:03,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:29:03,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578608952] [2021-06-05 21:29:03,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:03,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:03,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:03,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:03,630 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:03,734 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2021-06-05 21:29:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:29:03,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:03,735 INFO L225 Difference]: With dead ends: 245 [2021-06-05 21:29:03,735 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:29:03,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:29:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-06-05 21:29:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-06-05 21:29:03,737 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-06-05 21:29:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:03,737 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-06-05 21:29:03,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-06-05 21:29:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:03,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:03,738 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:03,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:03,938 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-06-05 21:29:03,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:03,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388200047] [2021-06-05 21:29:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:04,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388200047] [2021-06-05 21:29:04,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388200047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899904683] [2021-06-05 21:29:04,075 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:29:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:04,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:04,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:04,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:04,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:04,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:04,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:04,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 21:29:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:04,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899904683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:04,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:04,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:04,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974843713] [2021-06-05 21:29:04,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:04,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:04,314 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:04,510 INFO L93 Difference]: Finished difference Result 164 states and 445 transitions. [2021-06-05 21:29:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:29:04,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:04,511 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:29:04,511 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 21:29:04,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 21:29:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-06-05 21:29:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-06-05 21:29:04,513 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-06-05 21:29:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:04,513 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-06-05 21:29:04,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-06-05 21:29:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:04,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:04,520 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:04,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:04,720 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-06-05 21:29:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:04,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022644370] [2021-06-05 21:29:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:04,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:04,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022644370] [2021-06-05 21:29:04,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022644370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:04,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69925447] [2021-06-05 21:29:04,871 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 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 21:29:04,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:04,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:04,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:05,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:05,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:05,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:05,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:05,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:05,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:05,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:05,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:06,587 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 313 [2021-06-05 21:29:06,727 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-06-05 21:29:06,870 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-06-05 21:29:07,022 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 329 [2021-06-05 21:29:07,177 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 327 [2021-06-05 21:29:07,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:07,540 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:07,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:07,541 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69925447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:07,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:07,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:07,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769188996] [2021-06-05 21:29:07,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:07,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:07,567 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:07,888 INFO L93 Difference]: Finished difference Result 199 states and 522 transitions. [2021-06-05 21:29:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:29:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:07,889 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:29:07,889 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:29:07,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:29:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-06-05 21:29:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-06-05 21:29:07,891 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-06-05 21:29:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:07,891 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-06-05 21:29:07,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-06-05 21:29:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:07,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:07,892 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:08,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4334,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:08,105 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-06-05 21:29:08,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:08,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497814813] [2021-06-05 21:29:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:08,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:08,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497814813] [2021-06-05 21:29:08,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497814813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:08,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261754556] [2021-06-05 21:29:08,200 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 21:29:08,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:08,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:08,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:08,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:08,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:08,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:08,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:08,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:08,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:08,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:08,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:10,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:10,137 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:10,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:10,138 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:10,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261754556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:10,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:10,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167706075] [2021-06-05 21:29:10,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:10,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:10,164 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:10,613 INFO L93 Difference]: Finished difference Result 222 states and 560 transitions. [2021-06-05 21:29:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:29:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:10,614 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:29:10,614 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 21:29:10,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:29:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 21:29:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-06-05 21:29:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-06-05 21:29:10,616 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-06-05 21:29:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:10,616 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-06-05 21:29:10,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-06-05 21:29:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:10,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:10,617 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:10,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-06-05 21:29:10,825 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-06-05 21:29:10,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:10,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588312312] [2021-06-05 21:29:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:10,864 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 21:29:10,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588312312] [2021-06-05 21:29:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588312312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498792066] [2021-06-05 21:29:10,865 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:29:10,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:10,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:10,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498792066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:10,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:10,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:29:10,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023412516] [2021-06-05 21:29:10,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:29:10,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:10,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:29:10,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:29:10,939 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:29:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:10,975 INFO L93 Difference]: Finished difference Result 273 states and 654 transitions. [2021-06-05 21:29:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:29:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-05 21:29:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:10,976 INFO L225 Difference]: With dead ends: 273 [2021-06-05 21:29:10,976 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 21:29:10,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 21:29:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-06-05 21:29:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-06-05 21:29:10,979 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-06-05 21:29:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:10,979 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-06-05 21:29:10,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:29:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-06-05 21:29:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:10,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:10,980 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:11,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-06-05 21:29:11,196 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-06-05 21:29:11,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:11,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422428386] [2021-06-05 21:29:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:11,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:11,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422428386] [2021-06-05 21:29:11,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422428386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:11,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116496145] [2021-06-05 21:29:11,264 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 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 21:29:11,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:29:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:11,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:11,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:11,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:11,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:11,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:11,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:11,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:11,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:11,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:11,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:12,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:12,433 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:12,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:12,434 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:12,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116496145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:12,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:12,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:12,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498845535] [2021-06-05 21:29:12,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:12,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:12,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:12,459 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:12,939 INFO L93 Difference]: Finished difference Result 273 states and 689 transitions. [2021-06-05 21:29:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:29:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:12,940 INFO L225 Difference]: With dead ends: 273 [2021-06-05 21:29:12,940 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 21:29:12,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:29:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 21:29:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-06-05 21:29:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-06-05 21:29:12,943 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-06-05 21:29:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:12,943 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-06-05 21:29:12,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-06-05 21:29:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:12,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:12,943 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:13,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:13,144 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-06-05 21:29:13,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:13,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016553401] [2021-06-05 21:29:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:13,173 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 21:29:13,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:13,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016553401] [2021-06-05 21:29:13,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016553401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:13,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860825221] [2021-06-05 21:29:13,173 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 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 21:29:13,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:13,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:29:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:13,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860825221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:13,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:13,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:29:13,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553347835] [2021-06-05 21:29:13,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:13,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:13,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:13,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:13,224 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:13,285 INFO L93 Difference]: Finished difference Result 300 states and 694 transitions. [2021-06-05 21:29:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:29:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 21:29:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:13,287 INFO L225 Difference]: With dead ends: 300 [2021-06-05 21:29:13,287 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 21:29:13,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:29:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 21:29:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-06-05 21:29:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-06-05 21:29:13,289 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-06-05 21:29:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:13,289 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-06-05 21:29:13,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-06-05 21:29:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:13,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:13,290 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:13,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5248,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:13,495 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-06-05 21:29:13,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:13,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546285385] [2021-06-05 21:29:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:13,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:13,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546285385] [2021-06-05 21:29:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546285385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:13,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484079219] [2021-06-05 21:29:13,598 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:29:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:13,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:13,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:13,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:13,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:13,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:14,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:14,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:14,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:15,220 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 272 [2021-06-05 21:29:15,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:15,564 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:15,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:15,565 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484079219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:15,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:15,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:15,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546880551] [2021-06-05 21:29:15,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:15,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:15,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:15,591 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:16,055 INFO L93 Difference]: Finished difference Result 242 states and 614 transitions. [2021-06-05 21:29:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:16,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:16,056 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:29:16,056 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 21:29:16,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:29:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 21:29:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-06-05 21:29:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-06-05 21:29:16,059 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-06-05 21:29:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:16,059 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-06-05 21:29:16,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-06-05 21:29:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:16,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:16,059 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:16,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5249,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:16,273 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:16,273 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-06-05 21:29:16,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:16,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719461847] [2021-06-05 21:29:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:16,304 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 21:29:16,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:16,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719461847] [2021-06-05 21:29:16,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719461847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:16,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601928597] [2021-06-05 21:29:16,304 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 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 21:29:16,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:16,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:29:16,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:16,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601928597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:16,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:16,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:29:16,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797730747] [2021-06-05 21:29:16,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:16,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:16,353 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:16,433 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-06-05 21:29:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:29:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 21:29:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:16,434 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:29:16,434 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:29:16,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:29:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:29:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-06-05 21:29:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 21:29:16,437 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 21:29:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:16,437 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 21:29:16,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 21:29:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:16,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:16,437 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:16,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5581,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:16,652 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-06-05 21:29:16,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:16,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127792904] [2021-06-05 21:29:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:16,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:16,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127792904] [2021-06-05 21:29:16,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127792904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:16,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127322663] [2021-06-05 21:29:16,719 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 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 21:29:16,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:29:16,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:16,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:16,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:16,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:17,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:17,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:17,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:17,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:18,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:18,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:18,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:18,197 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:18,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:18,197 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127322663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:18,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:18,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:18,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59667417] [2021-06-05 21:29:18,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:18,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:18,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:18,225 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:18,789 INFO L93 Difference]: Finished difference Result 233 states and 590 transitions. [2021-06-05 21:29:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:29:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:18,790 INFO L225 Difference]: With dead ends: 233 [2021-06-05 21:29:18,790 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 21:29:18,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:29:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 21:29:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-06-05 21:29:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 21:29:18,793 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 21:29:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:18,793 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 21:29:18,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 21:29:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:18,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:18,793 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:19,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5582,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:19,009 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-06-05 21:29:19,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:19,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202701330] [2021-06-05 21:29:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:19,039 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 21:29:19,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:19,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202701330] [2021-06-05 21:29:19,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202701330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367732947] [2021-06-05 21:29:19,039 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 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 21:29:19,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:19,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:29:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:19,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367732947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:19,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:29:19,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890307975] [2021-06-05 21:29:19,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:19,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:19,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:19,090 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:19,190 INFO L93 Difference]: Finished difference Result 257 states and 618 transitions. [2021-06-05 21:29:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:29:19,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 21:29:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:19,192 INFO L225 Difference]: With dead ends: 257 [2021-06-05 21:29:19,192 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 21:29:19,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 21:29:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-06-05 21:29:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 21:29:19,194 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 21:29:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:19,194 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 21:29:19,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 21:29:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:19,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:19,195 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:19,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-06-05 21:29:19,397 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-06-05 21:29:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:19,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558574683] [2021-06-05 21:29:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:19,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558574683] [2021-06-05 21:29:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558574683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437580069] [2021-06-05 21:29:19,468 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 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 21:29:19,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:29:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:19,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:29:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:19,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:19,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 21:29:19,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:19,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:19,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 21:29:21,335 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 357 [2021-06-05 21:29:21,482 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 357 [2021-06-05 21:29:21,648 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 361 [2021-06-05 21:29:21,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:21,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:21,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 21:29:22,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:22,392 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 21:29:22,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:22,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 21:29:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:22,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437580069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:22,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:22,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 21:29:22,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041397362] [2021-06-05 21:29:22,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:22,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:22,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:22,419 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:22,967 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-06-05 21:29:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:29:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:29:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:22,968 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:29:22,968 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 21:29:22,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 676.8ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:29:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 21:29:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-06-05 21:29:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-06-05 21:29:22,971 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-06-05 21:29:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:22,971 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-06-05 21:29:22,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-06-05 21:29:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:29:22,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:22,971 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:23,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5826 [2021-06-05 21:29:23,177 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-06-05 21:29:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:23,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935565546] [2021-06-05 21:29:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:23,208 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 21:29:23,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:23,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935565546] [2021-06-05 21:29:23,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935565546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:23,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336957047] [2021-06-05 21:29:23,208 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 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 21:29:23,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:29:23,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:23,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336957047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:23,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:23,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:29:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14903758] [2021-06-05 21:29:23,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:23,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:23,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:23,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:23,257 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:23,362 INFO L93 Difference]: Finished difference Result 283 states and 699 transitions. [2021-06-05 21:29:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:29:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-05 21:29:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:23,363 INFO L225 Difference]: With dead ends: 283 [2021-06-05 21:29:23,363 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 21:29:23,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 21:29:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-06-05 21:29:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-06-05 21:29:23,366 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-06-05 21:29:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:23,366 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-06-05 21:29:23,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-06-05 21:29:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:23,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:23,366 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:23,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6284,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:23,577 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-06-05 21:29:23,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:23,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991677668] [2021-06-05 21:29:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:23,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:23,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991677668] [2021-06-05 21:29:23,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991677668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:23,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307929815] [2021-06-05 21:29:23,676 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 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 21:29:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:23,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:23,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:23,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:24,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:24,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:24,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:24,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:24,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307929815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:24,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:24,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:24,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357025828] [2021-06-05 21:29:24,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:24,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:24,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:24,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:24,152 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:24,426 INFO L93 Difference]: Finished difference Result 212 states and 582 transitions. [2021-06-05 21:29:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:29:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:24,427 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:29:24,427 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 21:29:24,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 21:29:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-06-05 21:29:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-06-05 21:29:24,429 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-06-05 21:29:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:24,429 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-06-05 21:29:24,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-06-05 21:29:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:24,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:24,430 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:24,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6285 [2021-06-05 21:29:24,638 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-06-05 21:29:24,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:24,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125813082] [2021-06-05 21:29:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:24,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:24,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125813082] [2021-06-05 21:29:24,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125813082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:24,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42580497] [2021-06-05 21:29:24,740 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 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 21:29:24,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:24,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:24,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:24,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:24,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:24,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:25,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:25,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:25,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:25,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:25,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42580497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:25,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:25,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404245662] [2021-06-05 21:29:25,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:25,078 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:25,361 INFO L93 Difference]: Finished difference Result 207 states and 575 transitions. [2021-06-05 21:29:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:25,362 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:29:25,362 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 21:29:25,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 21:29:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-06-05 21:29:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-06-05 21:29:25,364 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-06-05 21:29:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:25,365 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-06-05 21:29:25,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-06-05 21:29:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:25,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:25,365 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:25,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6369,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:25,581 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-06-05 21:29:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:25,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772377763] [2021-06-05 21:29:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:25,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:25,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772377763] [2021-06-05 21:29:25,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772377763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:25,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56329228] [2021-06-05 21:29:25,685 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 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 21:29:25,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:25,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:25,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:25,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:27,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:27,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:27,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:27,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:27,421 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:29:27,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:27,422 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 21:29:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:27,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56329228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:27,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:27,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:27,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617626571] [2021-06-05 21:29:27,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:27,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:27,449 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:27,782 INFO L93 Difference]: Finished difference Result 235 states and 628 transitions. [2021-06-05 21:29:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:29:27,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:27,783 INFO L225 Difference]: With dead ends: 235 [2021-06-05 21:29:27,783 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 21:29:27,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:29:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 21:29:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-06-05 21:29:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-06-05 21:29:27,786 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-06-05 21:29:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:27,786 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-06-05 21:29:27,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-06-05 21:29:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:27,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:27,786 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:27,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6405,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:27,989 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:27,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-06-05 21:29:27,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:27,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350872610] [2021-06-05 21:29:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:28,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350872610] [2021-06-05 21:29:28,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350872610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984640122] [2021-06-05 21:29:28,098 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 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 21:29:28,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:28,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:28,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:28,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:28,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:28,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:28,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:29,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:29,061 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:29:29,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:29,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 21:29:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:29,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984640122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:29,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:29,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773990167] [2021-06-05 21:29:29,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:29,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:29,088 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:29,492 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2021-06-05 21:29:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:29:29,492 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:29,493 INFO L225 Difference]: With dead ends: 263 [2021-06-05 21:29:29,493 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 21:29:29,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:29:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 21:29:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-06-05 21:29:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-06-05 21:29:29,495 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-06-05 21:29:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:29,496 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-06-05 21:29:29,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-06-05 21:29:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:29,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:29,496 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:29,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6709 [2021-06-05 21:29:29,697 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-06-05 21:29:29,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:29,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84380343] [2021-06-05 21:29:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:29,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:29,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84380343] [2021-06-05 21:29:29,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84380343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:29,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47319314] [2021-06-05 21:29:29,727 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 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 21:29:29,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:29:29,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47319314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:29,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:29,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:29:29,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218760899] [2021-06-05 21:29:29,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:29,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:29,782 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:29,824 INFO L93 Difference]: Finished difference Result 357 states and 825 transitions. [2021-06-05 21:29:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:29:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:29,826 INFO L225 Difference]: With dead ends: 357 [2021-06-05 21:29:29,826 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 21:29:29,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 21:29:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-06-05 21:29:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-06-05 21:29:29,829 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-06-05 21:29:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:29,829 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-06-05 21:29:29,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-06-05 21:29:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:29,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:29,829 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:30,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6875,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:30,037 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-06-05 21:29:30,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:30,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419953293] [2021-06-05 21:29:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:30,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419953293] [2021-06-05 21:29:30,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419953293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938412791] [2021-06-05 21:29:30,068 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 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 21:29:30,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:30,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:30,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938412791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:30,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:30,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:29:30,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181545450] [2021-06-05 21:29:30,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:30,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:30,116 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:30,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:30,176 INFO L93 Difference]: Finished difference Result 374 states and 857 transitions. [2021-06-05 21:29:30,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:29:30,176 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:30,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:30,177 INFO L225 Difference]: With dead ends: 374 [2021-06-05 21:29:30,177 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 21:29:30,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:29:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 21:29:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-06-05 21:29:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-06-05 21:29:30,180 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-06-05 21:29:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:30,180 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-06-05 21:29:30,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-06-05 21:29:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:30,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:30,181 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:30,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6876,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:30,381 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:30,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-06-05 21:29:30,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:30,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687461403] [2021-06-05 21:29:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:30,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:30,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687461403] [2021-06-05 21:29:30,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687461403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:30,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997564421] [2021-06-05 21:29:30,527 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 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 21:29:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:30,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:30,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:30,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:30,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:30,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:30,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:30,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997564421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:30,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:30,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:30,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702161644] [2021-06-05 21:29:30,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:30,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:30,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:30,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:30,834 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:31,069 INFO L93 Difference]: Finished difference Result 202 states and 560 transitions. [2021-06-05 21:29:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:29:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:31,070 INFO L225 Difference]: With dead ends: 202 [2021-06-05 21:29:31,070 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:29:31,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:29:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:29:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-06-05 21:29:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-06-05 21:29:31,073 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-06-05 21:29:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:31,073 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-06-05 21:29:31,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-06-05 21:29:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:31,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:31,073 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:31,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6877,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:31,285 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-06-05 21:29:31,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:31,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625405109] [2021-06-05 21:29:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:31,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:31,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625405109] [2021-06-05 21:29:31,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625405109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:31,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954843842] [2021-06-05 21:29:31,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:29:31,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:31,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:31,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:31,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:31,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:31,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:32,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:32,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:32,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:32,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:32,398 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:29:32,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:32,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 21:29:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:32,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954843842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:32,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:32,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:32,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339880654] [2021-06-05 21:29:32,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:32,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:32,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:32,425 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:32,752 INFO L93 Difference]: Finished difference Result 227 states and 606 transitions. [2021-06-05 21:29:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:32,753 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:29:32,753 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:29:32,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:29:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:29:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-06-05 21:29:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-06-05 21:29:32,755 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-06-05 21:29:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:32,755 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-06-05 21:29:32,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-06-05 21:29:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:32,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:32,756 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:32,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6919 [2021-06-05 21:29:32,961 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-06-05 21:29:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:32,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732162592] [2021-06-05 21:29:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:32,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:32,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732162592] [2021-06-05 21:29:32,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732162592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:32,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388139273] [2021-06-05 21:29:32,991 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 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 21:29:33,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388139273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:33,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:29:33,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253617262] [2021-06-05 21:29:33,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:33,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:33,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:33,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:33,057 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:33,112 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2021-06-05 21:29:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:29:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:33,114 INFO L225 Difference]: With dead ends: 377 [2021-06-05 21:29:33,114 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 21:29:33,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:29:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 21:29:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-06-05 21:29:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-06-05 21:29:33,116 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-06-05 21:29:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:33,117 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-06-05 21:29:33,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-06-05 21:29:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:33,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:33,117 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:33,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7094,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,318 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-06-05 21:29:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803879422] [2021-06-05 21:29:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:33,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803879422] [2021-06-05 21:29:33,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803879422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244137019] [2021-06-05 21:29:33,353 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 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 21:29:33,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:33,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244137019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:33,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:33,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242142283] [2021-06-05 21:29:33,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:33,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:33,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:33,414 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:33,514 INFO L93 Difference]: Finished difference Result 413 states and 931 transitions. [2021-06-05 21:29:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:29:33,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:33,515 INFO L225 Difference]: With dead ends: 413 [2021-06-05 21:29:33,515 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 21:29:33,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 21:29:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-06-05 21:29:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-06-05 21:29:33,518 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-06-05 21:29:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:33,519 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-06-05 21:29:33,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-06-05 21:29:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:33,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:33,519 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:33,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7095,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,720 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-06-05 21:29:33,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:33,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77180429] [2021-06-05 21:29:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:33,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77180429] [2021-06-05 21:29:33,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77180429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149822906] [2021-06-05 21:29:33,857 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 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 21:29:33,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:29:33,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:33,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:33,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:34,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:34,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:34,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:34,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:34,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:34,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:34,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149822906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:34,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:34,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:34,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936311523] [2021-06-05 21:29:34,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:34,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:34,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:34,173 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:34,471 INFO L93 Difference]: Finished difference Result 211 states and 586 transitions. [2021-06-05 21:29:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:29:34,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:34,472 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:29:34,472 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:29:34,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:29:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:29:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-06-05 21:29:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-06-05 21:29:34,474 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-06-05 21:29:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:34,474 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-06-05 21:29:34,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-06-05 21:29:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:34,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:34,475 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:34,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7096,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:34,689 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-06-05 21:29:34,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:34,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718776831] [2021-06-05 21:29:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:34,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718776831] [2021-06-05 21:29:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718776831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015137311] [2021-06-05 21:29:34,834 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 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 21:29:34,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:34,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:34,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:34,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:35,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:35,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:35,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 21:29:35,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:35,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:35,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:35,884 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-06-05 21:29:35,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:35,885 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 21:29:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:35,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015137311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:35,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:35,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:35,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932324011] [2021-06-05 21:29:35,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:35,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:35,912 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:36,268 INFO L93 Difference]: Finished difference Result 244 states and 655 transitions. [2021-06-05 21:29:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:29:36,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:36,269 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:29:36,269 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:29:36,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:29:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:29:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-06-05 21:29:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-06-05 21:29:36,272 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-06-05 21:29:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:36,272 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-06-05 21:29:36,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-06-05 21:29:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:36,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:36,272 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:36,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7137 [2021-06-05 21:29:36,473 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-06-05 21:29:36,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:36,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962289814] [2021-06-05 21:29:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:36,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:36,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962289814] [2021-06-05 21:29:36,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962289814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:36,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825018529] [2021-06-05 21:29:36,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:29:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:36,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:36,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825018529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:36,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:36,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:36,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493898560] [2021-06-05 21:29:36,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:36,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:36,554 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:36,643 INFO L93 Difference]: Finished difference Result 427 states and 977 transitions. [2021-06-05 21:29:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:29:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:36,644 INFO L225 Difference]: With dead ends: 427 [2021-06-05 21:29:36,644 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 21:29:36,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 21:29:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-06-05 21:29:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-06-05 21:29:36,648 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-06-05 21:29:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:36,648 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-06-05 21:29:36,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-06-05 21:29:36,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:36,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:36,648 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:36,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7310 [2021-06-05 21:29:36,865 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-06-05 21:29:36,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:36,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37599714] [2021-06-05 21:29:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:36,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:36,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37599714] [2021-06-05 21:29:36,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37599714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:36,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315971863] [2021-06-05 21:29:36,898 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 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 21:29:36,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:36,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:36,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:36,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:36,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315971863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:36,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:36,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:36,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500339458] [2021-06-05 21:29:36,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:36,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:36,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:36,950 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:37,069 INFO L93 Difference]: Finished difference Result 378 states and 905 transitions. [2021-06-05 21:29:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:29:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:37,071 INFO L225 Difference]: With dead ends: 378 [2021-06-05 21:29:37,071 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 21:29:37,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 21:29:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-06-05 21:29:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-06-05 21:29:37,074 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-06-05 21:29:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:37,074 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-06-05 21:29:37,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-06-05 21:29:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:37,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:37,074 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:37,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7311 [2021-06-05 21:29:37,275 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:37,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-06-05 21:29:37,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:37,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256452371] [2021-06-05 21:29:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:37,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:37,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256452371] [2021-06-05 21:29:37,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256452371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:37,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131850768] [2021-06-05 21:29:37,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:29:37,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:37,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:37,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:37,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:37,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:37,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:37,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:37,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:37,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:37,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:37,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131850768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:37,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:37,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:37,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053151003] [2021-06-05 21:29:37,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:37,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:37,861 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:38,080 INFO L93 Difference]: Finished difference Result 222 states and 624 transitions. [2021-06-05 21:29:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:38,081 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:29:38,081 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:29:38,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:29:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-06-05 21:29:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-06-05 21:29:38,084 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-06-05 21:29:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:38,084 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-06-05 21:29:38,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-06-05 21:29:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:38,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:38,084 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:38,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7312 [2021-06-05 21:29:38,285 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-06-05 21:29:38,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:38,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282245083] [2021-06-05 21:29:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:38,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:38,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282245083] [2021-06-05 21:29:38,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282245083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:38,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058623775] [2021-06-05 21:29:38,467 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 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 21:29:38,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:38,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:38,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:38,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:39,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:39,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:39,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:39,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:39,279 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:29:39,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:39,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 21:29:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:39,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058623775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:39,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:39,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:39,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055635261] [2021-06-05 21:29:39,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:39,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:39,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:39,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:39,306 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:39,631 INFO L93 Difference]: Finished difference Result 256 states and 697 transitions. [2021-06-05 21:29:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:39,632 INFO L225 Difference]: With dead ends: 256 [2021-06-05 21:29:39,632 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 21:29:39,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:29:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 21:29:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-06-05 21:29:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-06-05 21:29:39,644 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-06-05 21:29:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:39,644 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-06-05 21:29:39,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-06-05 21:29:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:39,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:39,644 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:39,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7386,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:39,845 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:39,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-06-05 21:29:39,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:39,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665633984] [2021-06-05 21:29:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:39,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:39,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665633984] [2021-06-05 21:29:39,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665633984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:39,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974900547] [2021-06-05 21:29:39,872 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 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 21:29:39,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:39,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:39,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:29:39,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974900547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:39,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:39,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:29:39,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710709042] [2021-06-05 21:29:39,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:29:39,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:39,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:29:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:29:39,919 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:39,951 INFO L93 Difference]: Finished difference Result 345 states and 847 transitions. [2021-06-05 21:29:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:29:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:39,953 INFO L225 Difference]: With dead ends: 345 [2021-06-05 21:29:39,953 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 21:29:39,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 21:29:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-06-05 21:29:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 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 21:29:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-06-05 21:29:39,956 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-06-05 21:29:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:39,956 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-06-05 21:29:39,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-06-05 21:29:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:39,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:39,956 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:40,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7543 [2021-06-05 21:29:40,172 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-06-05 21:29:40,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:40,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860001836] [2021-06-05 21:29:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:40,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860001836] [2021-06-05 21:29:40,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860001836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763922935] [2021-06-05 21:29:40,205 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 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 21:29:40,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:40,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:40,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:40,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763922935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:40,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:40,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:29:40,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421704110] [2021-06-05 21:29:40,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:40,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:40,252 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:40,304 INFO L93 Difference]: Finished difference Result 369 states and 882 transitions. [2021-06-05 21:29:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:29:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:40,305 INFO L225 Difference]: With dead ends: 369 [2021-06-05 21:29:40,305 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 21:29:40,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:29:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 21:29:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-06-05 21:29:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-06-05 21:29:40,309 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-06-05 21:29:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:40,309 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-06-05 21:29:40,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:29:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-06-05 21:29:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:40,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:40,309 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:40,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7544 [2021-06-05 21:29:40,525 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:40,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-06-05 21:29:40,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:40,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558854871] [2021-06-05 21:29:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:40,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:40,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558854871] [2021-06-05 21:29:40,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558854871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:40,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436491788] [2021-06-05 21:29:40,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:29:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:40,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436491788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:40,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:40,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:40,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199635416] [2021-06-05 21:29:40,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:40,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:40,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:40,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:40,644 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:40,722 INFO L93 Difference]: Finished difference Result 388 states and 893 transitions. [2021-06-05 21:29:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:29:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:40,723 INFO L225 Difference]: With dead ends: 388 [2021-06-05 21:29:40,723 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 21:29:40,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 21:29:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-06-05 21:29:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-06-05 21:29:40,726 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-06-05 21:29:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:40,726 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-06-05 21:29:40,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-06-05 21:29:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:40,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:40,728 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:40,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7545,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:40,943 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-06-05 21:29:40,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:40,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773669983] [2021-06-05 21:29:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:40,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773669983] [2021-06-05 21:29:40,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773669983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439704397] [2021-06-05 21:29:40,973 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 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 21:29:40,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:40,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:40,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:41,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439704397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:41,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:41,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335564568] [2021-06-05 21:29:41,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:41,022 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:41,134 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2021-06-05 21:29:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:29:41,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:41,135 INFO L225 Difference]: With dead ends: 319 [2021-06-05 21:29:41,135 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 21:29:41,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 21:29:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-06-05 21:29:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-06-05 21:29:41,139 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-06-05 21:29:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:41,139 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-06-05 21:29:41,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-06-05 21:29:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:41,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:41,139 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:41,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7546 [2021-06-05 21:29:41,349 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-06-05 21:29:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255688473] [2021-06-05 21:29:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:41,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:41,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255688473] [2021-06-05 21:29:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255688473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:41,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757460906] [2021-06-05 21:29:41,383 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 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 21:29:41,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:41,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:41,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:41,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757460906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:41,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:41,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:41,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521780293] [2021-06-05 21:29:41,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:41,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:41,437 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:41,569 INFO L93 Difference]: Finished difference Result 345 states and 840 transitions. [2021-06-05 21:29:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:41,570 INFO L225 Difference]: With dead ends: 345 [2021-06-05 21:29:41,570 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 21:29:41,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 21:29:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-06-05 21:29:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-06-05 21:29:41,572 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-06-05 21:29:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:41,572 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-06-05 21:29:41,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-06-05 21:29:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:41,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:41,573 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:41,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7547,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:41,773 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:41,774 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-06-05 21:29:41,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:41,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900085820] [2021-06-05 21:29:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:41,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900085820] [2021-06-05 21:29:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900085820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868649410] [2021-06-05 21:29:41,915 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 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 21:29:41,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:41,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:41,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:42,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:42,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:42,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:42,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:42,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:42,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:29:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:42,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868649410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:42,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:42,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:42,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353199670] [2021-06-05 21:29:42,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:42,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:42,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:42,300 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:42,540 INFO L93 Difference]: Finished difference Result 234 states and 664 transitions. [2021-06-05 21:29:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:42,541 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:29:42,541 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 21:29:42,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 21:29:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-06-05 21:29:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-06-05 21:29:42,551 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-06-05 21:29:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:42,551 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-06-05 21:29:42,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-06-05 21:29:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:42,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:42,551 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:42,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7548,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:42,761 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-06-05 21:29:42,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:42,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669399581] [2021-06-05 21:29:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:42,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:42,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669399581] [2021-06-05 21:29:42,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669399581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:42,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860318414] [2021-06-05 21:29:42,897 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 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 21:29:42,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:42,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:43,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:43,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:43,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:43,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:43,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:43,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:44,015 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:29:44,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:44,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 21:29:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860318414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:44,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:44,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:44,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642678064] [2021-06-05 21:29:44,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:44,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:44,043 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:44,437 INFO L93 Difference]: Finished difference Result 272 states and 753 transitions. [2021-06-05 21:29:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:29:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:44,437 INFO L225 Difference]: With dead ends: 272 [2021-06-05 21:29:44,437 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:29:44,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:29:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:29:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-06-05 21:29:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-06-05 21:29:44,440 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-06-05 21:29:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:44,440 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-06-05 21:29:44,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-06-05 21:29:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:44,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:44,440 INFO L554 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:44,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7612,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:44,641 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:44,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-06-05 21:29:44,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:44,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906206475] [2021-06-05 21:29:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:44,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:44,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906206475] [2021-06-05 21:29:44,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906206475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:44,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398117548] [2021-06-05 21:29:44,781 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 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 21:29:44,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:29:44,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:44,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 21:29:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:45,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:45,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 21:29:45,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 21:29:45,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:45,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:29:45,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:45,857 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 21:29:45,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:29:45,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 21:29:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:45,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398117548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:45,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:45,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581480845] [2021-06-05 21:29:45,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:45,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:45,885 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:46,591 INFO L93 Difference]: Finished difference Result 304 states and 812 transitions. [2021-06-05 21:29:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:29:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:46,592 INFO L225 Difference]: With dead ends: 304 [2021-06-05 21:29:46,592 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 21:29:46,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:29:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 21:29:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-06-05 21:29:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-06-05 21:29:46,595 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-06-05 21:29:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:46,595 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-06-05 21:29:46,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-06-05 21:29:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:46,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:46,595 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:46,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7795 [2021-06-05 21:29:46,796 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-06-05 21:29:46,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:46,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582395265] [2021-06-05 21:29:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:46,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:46,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582395265] [2021-06-05 21:29:46,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582395265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:46,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113211214] [2021-06-05 21:29:46,835 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 21:29:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:46,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113211214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:46,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:46,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:29:46,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918880031] [2021-06-05 21:29:46,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:46,892 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:46,936 INFO L93 Difference]: Finished difference Result 364 states and 870 transitions. [2021-06-05 21:29:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:29:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:46,937 INFO L225 Difference]: With dead ends: 364 [2021-06-05 21:29:46,937 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 21:29:46,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:29:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 21:29:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-06-05 21:29:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-06-05 21:29:46,939 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-06-05 21:29:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:46,939 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-06-05 21:29:46,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-06-05 21:29:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:46,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:46,940 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7995 [2021-06-05 21:29:47,149 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-06-05 21:29:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904463606] [2021-06-05 21:29:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:47,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904463606] [2021-06-05 21:29:47,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904463606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098686750] [2021-06-05 21:29:47,188 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 21:29:47,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:47,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:47,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:47,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098686750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:47,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:29:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057185561] [2021-06-05 21:29:47,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:29:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:29:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:29:47,236 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:47,284 INFO L93 Difference]: Finished difference Result 346 states and 892 transitions. [2021-06-05 21:29:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:29:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:47,285 INFO L225 Difference]: With dead ends: 346 [2021-06-05 21:29:47,285 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 21:29:47,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:29:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 21:29:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-06-05 21:29:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-06-05 21:29:47,288 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-06-05 21:29:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:47,288 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-06-05 21:29:47,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-06-05 21:29:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:47,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:47,289 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:47,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7996,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:47,489 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-06-05 21:29:47,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:47,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592280183] [2021-06-05 21:29:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592280183] [2021-06-05 21:29:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592280183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250710381] [2021-06-05 21:29:47,524 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 21:29:47,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:29:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:47,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:47,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250710381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:47,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268530929] [2021-06-05 21:29:47,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:47,578 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:47,652 INFO L93 Difference]: Finished difference Result 372 states and 930 transitions. [2021-06-05 21:29:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:29:47,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:47,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:47,653 INFO L225 Difference]: With dead ends: 372 [2021-06-05 21:29:47,653 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 21:29:47,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:29:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 21:29:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-06-05 21:29:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-06-05 21:29:47,656 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-06-05 21:29:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:47,656 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-06-05 21:29:47,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-06-05 21:29:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:47,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:47,657 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:47,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7997,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:47,857 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-06-05 21:29:47,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:47,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662261243] [2021-06-05 21:29:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:47,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662261243] [2021-06-05 21:29:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662261243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814843889] [2021-06-05 21:29:47,893 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 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 21:29:47,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:47,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814843889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:47,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:47,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643368543] [2021-06-05 21:29:47,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:47,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:47,945 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:48,057 INFO L93 Difference]: Finished difference Result 335 states and 866 transitions. [2021-06-05 21:29:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:29:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:48,057 INFO L225 Difference]: With dead ends: 335 [2021-06-05 21:29:48,057 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 21:29:48,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:29:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 21:29:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-06-05 21:29:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-06-05 21:29:48,060 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-06-05 21:29:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:48,060 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-06-05 21:29:48,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-06-05 21:29:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:48,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:48,061 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:48,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7998,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:48,261 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:48,262 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-06-05 21:29:48,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:48,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279681308] [2021-06-05 21:29:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:48,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:48,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279681308] [2021-06-05 21:29:48,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279681308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:48,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156732148] [2021-06-05 21:29:48,315 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 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 21:29:48,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:48,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:48,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156732148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:48,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:48,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:48,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767988541] [2021-06-05 21:29:48,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:48,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:48,392 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:48,516 INFO L93 Difference]: Finished difference Result 346 states and 896 transitions. [2021-06-05 21:29:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:29:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:48,517 INFO L225 Difference]: With dead ends: 346 [2021-06-05 21:29:48,517 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 21:29:48,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 21:29:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-06-05 21:29:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-06-05 21:29:48,520 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-06-05 21:29:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:48,520 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-06-05 21:29:48,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-06-05 21:29:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:29:48,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:48,520 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:48,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7999,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:48,735 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-06-05 21:29:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:48,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996542501] [2021-06-05 21:29:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:48,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996542501] [2021-06-05 21:29:48,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996542501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308956151] [2021-06-05 21:29:48,771 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 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 21:29:48,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:29:48,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:29:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:48,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308956151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:48,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:48,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:48,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460824065] [2021-06-05 21:29:48,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:48,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:48,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:48,823 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:48,936 INFO L93 Difference]: Finished difference Result 385 states and 1019 transitions. [2021-06-05 21:29:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:29:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:29:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:48,937 INFO L225 Difference]: With dead ends: 385 [2021-06-05 21:29:48,937 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 21:29:48,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 21:29:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-06-05 21:29:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-06-05 21:29:48,940 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-06-05 21:29:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:48,940 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-06-05 21:29:48,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-06-05 21:29:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:48,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:48,941 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:49,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8000 [2021-06-05 21:29:49,141 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-06-05 21:29:49,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:49,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983689523] [2021-06-05 21:29:49,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:49,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:49,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983689523] [2021-06-05 21:29:49,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983689523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:49,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753274280] [2021-06-05 21:29:49,217 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 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 21:29:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:49,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:29:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:49,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:49,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:29:50,353 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-06-05 21:29:50,460 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-06-05 21:29:50,571 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-06-05 21:29:50,690 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 221 [2021-06-05 21:29:50,841 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 232 [2021-06-05 21:29:51,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:51,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:51,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:51,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:29:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753274280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:51,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:51,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:51,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049129710] [2021-06-05 21:29:51,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:51,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:51,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:51,109 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:51,377 INFO L93 Difference]: Finished difference Result 306 states and 891 transitions. [2021-06-05 21:29:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:29:51,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:51,378 INFO L225 Difference]: With dead ends: 306 [2021-06-05 21:29:51,378 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 21:29:51,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 21:29:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-06-05 21:29:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-06-05 21:29:51,381 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-06-05 21:29:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:51,381 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-06-05 21:29:51,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-06-05 21:29:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:51,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:51,382 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:51,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8001,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:51,582 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-06-05 21:29:51,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:51,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246790645] [2021-06-05 21:29:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:51,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:51,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246790645] [2021-06-05 21:29:51,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246790645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:51,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260774562] [2021-06-05 21:29:51,677 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 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 21:29:51,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:29:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:52,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:52,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:29:52,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:52,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:52,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:52,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:29:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:52,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260774562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:52,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:52,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:52,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723134294] [2021-06-05 21:29:52,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:52,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:52,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:52,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:52,570 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:53,175 INFO L93 Difference]: Finished difference Result 402 states and 1031 transitions. [2021-06-05 21:29:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:29:53,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:53,176 INFO L225 Difference]: With dead ends: 402 [2021-06-05 21:29:53,177 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 21:29:53,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:29:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 21:29:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-06-05 21:29:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-06-05 21:29:53,180 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-06-05 21:29:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:53,180 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-06-05 21:29:53,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-06-05 21:29:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:53,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:53,180 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:53,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8203 [2021-06-05 21:29:53,381 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:53,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:53,381 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-06-05 21:29:53,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:53,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209814717] [2021-06-05 21:29:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:53,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:53,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209814717] [2021-06-05 21:29:53,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209814717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:53,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493994541] [2021-06-05 21:29:53,418 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 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 21:29:53,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:29:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:29:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:53,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493994541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:53,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:53,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:53,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510705363] [2021-06-05 21:29:53,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:53,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:53,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:53,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:53,472 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:53,522 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-06-05 21:29:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:29:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:53,523 INFO L225 Difference]: With dead ends: 460 [2021-06-05 21:29:53,523 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 21:29:53,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:29:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 21:29:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-06-05 21:29:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-06-05 21:29:53,527 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-06-05 21:29:53,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:53,527 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-06-05 21:29:53,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-06-05 21:29:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:53,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:53,527 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:53,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8310,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:53,728 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:53,728 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-06-05 21:29:53,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:53,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903287343] [2021-06-05 21:29:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:53,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:53,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903287343] [2021-06-05 21:29:53,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903287343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:53,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355840134] [2021-06-05 21:29:53,762 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 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 21:29:53,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:53,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:53,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:29:53,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:53,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355840134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:53,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:53,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:29:53,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359428317] [2021-06-05 21:29:53,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:53,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:53,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:53,816 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:53,883 INFO L93 Difference]: Finished difference Result 492 states and 1194 transitions. [2021-06-05 21:29:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:29:53,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:53,884 INFO L225 Difference]: With dead ends: 492 [2021-06-05 21:29:53,884 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 21:29:53,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:29:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 21:29:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-06-05 21:29:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-06-05 21:29:53,887 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-06-05 21:29:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:53,887 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-06-05 21:29:53,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-06-05 21:29:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:53,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:53,888 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:54,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8311 [2021-06-05 21:29:54,089 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-06-05 21:29:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:54,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094422433] [2021-06-05 21:29:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:54,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:54,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094422433] [2021-06-05 21:29:54,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094422433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:54,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106273255] [2021-06-05 21:29:54,182 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 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 21:29:54,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:54,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:29:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:54,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:29:54,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:54,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:54,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:54,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:29:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:54,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106273255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:54,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:54,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:54,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781305862] [2021-06-05 21:29:54,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:54,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:54,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:54,811 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:55,043 INFO L93 Difference]: Finished difference Result 323 states and 904 transitions. [2021-06-05 21:29:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:29:55,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:55,044 INFO L225 Difference]: With dead ends: 323 [2021-06-05 21:29:55,044 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 21:29:55,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 21:29:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-06-05 21:29:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-06-05 21:29:55,048 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-06-05 21:29:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:55,048 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-06-05 21:29:55,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-06-05 21:29:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:55,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:55,049 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:55,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8312 [2021-06-05 21:29:55,261 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-06-05 21:29:55,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:55,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834735805] [2021-06-05 21:29:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:55,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:55,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834735805] [2021-06-05 21:29:55,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834735805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:55,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57027835] [2021-06-05 21:29:55,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:29:55,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:29:55,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:55,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:29:55,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:55,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:29:56,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:56,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:56,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:56,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:29:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:56,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57027835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:56,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:56,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:56,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250277805] [2021-06-05 21:29:56,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:56,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:56,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:56,168 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:56,563 INFO L93 Difference]: Finished difference Result 333 states and 930 transitions. [2021-06-05 21:29:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:29:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:56,564 INFO L225 Difference]: With dead ends: 333 [2021-06-05 21:29:56,564 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 21:29:56,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:29:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 21:29:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-06-05 21:29:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-06-05 21:29:56,567 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-06-05 21:29:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:56,567 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-06-05 21:29:56,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-06-05 21:29:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:56,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:56,568 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:56,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8409 [2021-06-05 21:29:56,768 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-06-05 21:29:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:56,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805727795] [2021-06-05 21:29:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:56,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:56,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805727795] [2021-06-05 21:29:56,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805727795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818041692] [2021-06-05 21:29:56,841 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 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 21:29:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:29:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:57,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:57,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:29:58,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:29:58,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:58,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:29:58,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:29:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:58,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818041692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:58,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:58,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:29:58,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59304071] [2021-06-05 21:29:58,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:58,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:58,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:58,113 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:58,648 INFO L93 Difference]: Finished difference Result 351 states and 960 transitions. [2021-06-05 21:29:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:29:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:58,649 INFO L225 Difference]: With dead ends: 351 [2021-06-05 21:29:58,650 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 21:29:58,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:29:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 21:29:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-06-05 21:29:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 21:29:58,652 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 21:29:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:58,653 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 21:29:58,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 21:29:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:58,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:58,653 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:58,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8516,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:58,854 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-06-05 21:29:58,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:58,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010524668] [2021-06-05 21:29:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:58,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:58,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010524668] [2021-06-05 21:29:58,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010524668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:58,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940686171] [2021-06-05 21:29:58,890 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 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 21:29:58,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:58,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:29:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:58,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940686171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:58,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:58,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:29:58,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208884519] [2021-06-05 21:29:58,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:29:58,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:58,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:29:58,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:29:58,938 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:59,022 INFO L93 Difference]: Finished difference Result 527 states and 1263 transitions. [2021-06-05 21:29:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:29:59,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:29:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:59,023 INFO L225 Difference]: With dead ends: 527 [2021-06-05 21:29:59,024 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 21:29:59,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 21:29:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-06-05 21:29:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 21:29:59,027 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 21:29:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:59,027 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 21:29:59,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 21:29:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:29:59,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:59,028 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:59,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8687 [2021-06-05 21:29:59,228 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-06-05 21:29:59,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:59,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220901880] [2021-06-05 21:29:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:59,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:59,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220901880] [2021-06-05 21:29:59,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220901880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:59,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931697964] [2021-06-05 21:29:59,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:29:59,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:29:59,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:29:59,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:59,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:29:59,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:00,165 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 284 [2021-06-05 21:30:01,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:01,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:01,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:01,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931697964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:01,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:01,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012674296] [2021-06-05 21:30:01,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:01,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:01,007 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:01,200 INFO L93 Difference]: Finished difference Result 307 states and 875 transitions. [2021-06-05 21:30:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:30:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:01,201 INFO L225 Difference]: With dead ends: 307 [2021-06-05 21:30:01,201 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 21:30:01,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 21:30:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-06-05 21:30:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 21:30:01,204 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 21:30:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:01,204 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 21:30:01,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 21:30:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:01,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:01,204 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:01,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-06-05 21:30:01,405 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-06-05 21:30:01,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:01,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134983836] [2021-06-05 21:30:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:01,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134983836] [2021-06-05 21:30:01,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134983836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431134535] [2021-06-05 21:30:01,435 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 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 21:30:01,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:01,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:01,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:01,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431134535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:01,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583333560] [2021-06-05 21:30:01,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:01,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:01,483 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:01,538 INFO L93 Difference]: Finished difference Result 474 states and 1151 transitions. [2021-06-05 21:30:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:30:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 21:30:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:01,540 INFO L225 Difference]: With dead ends: 474 [2021-06-05 21:30:01,540 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 21:30:01,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 21:30:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-06-05 21:30:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-06-05 21:30:01,543 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-06-05 21:30:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:01,543 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-06-05 21:30:01,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-06-05 21:30:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:01,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:01,543 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:01,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8868,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:01,744 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-06-05 21:30:01,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:01,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517908292] [2021-06-05 21:30:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517908292] [2021-06-05 21:30:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517908292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327254898] [2021-06-05 21:30:01,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:01,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:01,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:01,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:02,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:02,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:02,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:02,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:02,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:02,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:02,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327254898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:02,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:02,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:02,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52982115] [2021-06-05 21:30:02,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:02,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:02,581 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:03,007 INFO L93 Difference]: Finished difference Result 373 states and 1019 transitions. [2021-06-05 21:30:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:30:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:03,012 INFO L225 Difference]: With dead ends: 373 [2021-06-05 21:30:03,012 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 21:30:03,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:30:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 21:30:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-06-05 21:30:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 21:30:03,016 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-06-05 21:30:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:03,016 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 21:30:03,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 21:30:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:03,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:03,016 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:03,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8869,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:03,217 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-06-05 21:30:03,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:03,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019129126] [2021-06-05 21:30:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:03,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019129126] [2021-06-05 21:30:03,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019129126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441160726] [2021-06-05 21:30:03,261 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 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 21:30:03,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:03,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441160726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:03,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:03,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:03,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949714699] [2021-06-05 21:30:03,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:03,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:03,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:03,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:03,313 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:03,413 INFO L93 Difference]: Finished difference Result 514 states and 1221 transitions. [2021-06-05 21:30:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:30:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:03,414 INFO L225 Difference]: With dead ends: 514 [2021-06-05 21:30:03,414 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 21:30:03,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 21:30:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-06-05 21:30:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-06-05 21:30:03,418 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-06-05 21:30:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:03,418 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-06-05 21:30:03,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-06-05 21:30:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:03,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:03,418 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:03,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8982 [2021-06-05 21:30:03,633 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-06-05 21:30:03,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:03,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405391106] [2021-06-05 21:30:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:03,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405391106] [2021-06-05 21:30:03,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405391106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348370662] [2021-06-05 21:30:03,671 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 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 21:30:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348370662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:03,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:03,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525179012] [2021-06-05 21:30:03,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:03,729 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:03,885 INFO L93 Difference]: Finished difference Result 554 states and 1291 transitions. [2021-06-05 21:30:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:03,886 INFO L225 Difference]: With dead ends: 554 [2021-06-05 21:30:03,886 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 21:30:03,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 21:30:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-06-05 21:30:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-06-05 21:30:03,893 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-06-05 21:30:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:03,893 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-06-05 21:30:03,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-06-05 21:30:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:03,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:03,894 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:04,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8983,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:04,094 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-06-05 21:30:04,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:04,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917133498] [2021-06-05 21:30:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:04,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:04,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917133498] [2021-06-05 21:30:04,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917133498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:04,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805005889] [2021-06-05 21:30:04,201 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 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 21:30:04,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:04,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:04,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:04,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:04,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:04,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:04,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:04,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:04,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:04,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805005889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:04,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:04,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:04,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950419558] [2021-06-05 21:30:04,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:04,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:04,912 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:05,167 INFO L93 Difference]: Finished difference Result 301 states and 868 transitions. [2021-06-05 21:30:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:05,168 INFO L225 Difference]: With dead ends: 301 [2021-06-05 21:30:05,168 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 21:30:05,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 21:30:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-06-05 21:30:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:05,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-06-05 21:30:05,171 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-06-05 21:30:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:05,171 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-06-05 21:30:05,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-06-05 21:30:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:05,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:05,171 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:05,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8984 [2021-06-05 21:30:05,385 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-06-05 21:30:05,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:05,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827381610] [2021-06-05 21:30:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:05,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:05,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827381610] [2021-06-05 21:30:05,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827381610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:05,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941061109] [2021-06-05 21:30:05,425 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 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 21:30:05,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:30:05,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:05,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:05,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:05,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941061109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:05,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:05,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:30:05,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529146462] [2021-06-05 21:30:05,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:30:05,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:30:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:30:05,480 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:05,516 INFO L93 Difference]: Finished difference Result 435 states and 1110 transitions. [2021-06-05 21:30:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:30:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:05,517 INFO L225 Difference]: With dead ends: 435 [2021-06-05 21:30:05,517 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 21:30:05,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 21:30:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-06-05 21:30:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-06-05 21:30:05,521 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-06-05 21:30:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:05,521 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-06-05 21:30:05,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-06-05 21:30:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:05,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:05,521 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:05,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9123,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:05,729 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-06-05 21:30:05,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:05,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727090816] [2021-06-05 21:30:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:05,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727090816] [2021-06-05 21:30:05,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727090816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908191938] [2021-06-05 21:30:05,761 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 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 21:30:05,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:05,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:05,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:05,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:05,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908191938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:05,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:05,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:05,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533603237] [2021-06-05 21:30:05,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:05,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:05,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:05,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:05,816 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:05,887 INFO L93 Difference]: Finished difference Result 471 states and 1163 transitions. [2021-06-05 21:30:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:30:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 21:30:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:05,888 INFO L225 Difference]: With dead ends: 471 [2021-06-05 21:30:05,888 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 21:30:05,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 21:30:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-06-05 21:30:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-06-05 21:30:05,910 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-06-05 21:30:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:05,910 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-06-05 21:30:05,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-06-05 21:30:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:05,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:05,910 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:06,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9124 [2021-06-05 21:30:06,125 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:06,126 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-06-05 21:30:06,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:06,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233918799] [2021-06-05 21:30:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:06,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233918799] [2021-06-05 21:30:06,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233918799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071474571] [2021-06-05 21:30:06,198 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 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 21:30:06,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:06,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:06,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:06,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:06,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:06,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:06,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:06,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:06,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:06,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071474571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:06,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:06,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:06,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239986377] [2021-06-05 21:30:06,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:06,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:06,924 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:07,234 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-06-05 21:30:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:07,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:07,235 INFO L225 Difference]: With dead ends: 383 [2021-06-05 21:30:07,235 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 21:30:07,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 21:30:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-06-05 21:30:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 21:30:07,238 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 21:30:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:07,238 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 21:30:07,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 21:30:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:07,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:07,239 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:07,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9125 [2021-06-05 21:30:07,439 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-06-05 21:30:07,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:07,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131561118] [2021-06-05 21:30:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:07,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:07,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131561118] [2021-06-05 21:30:07,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131561118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:07,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53302585] [2021-06-05 21:30:07,517 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 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 21:30:07,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:07,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:07,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53302585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:07,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:07,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:07,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602133422] [2021-06-05 21:30:07,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:07,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:07,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:07,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:07,569 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:07,656 INFO L93 Difference]: Finished difference Result 503 states and 1214 transitions. [2021-06-05 21:30:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:30:07,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:07,657 INFO L225 Difference]: With dead ends: 503 [2021-06-05 21:30:07,657 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 21:30:07,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 21:30:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-06-05 21:30:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 21:30:07,661 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 21:30:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:07,661 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 21:30:07,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 21:30:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:07,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:07,661 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:07,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9256 [2021-06-05 21:30:07,877 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:07,878 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-06-05 21:30:07,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:07,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971993438] [2021-06-05 21:30:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:08,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:08,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971993438] [2021-06-05 21:30:08,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971993438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:08,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601645853] [2021-06-05 21:30:08,049 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 21:30:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:08,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:08,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601645853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:08,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:08,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:08,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674123846] [2021-06-05 21:30:08,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:08,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:08,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:08,109 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:08,244 INFO L93 Difference]: Finished difference Result 546 states and 1298 transitions. [2021-06-05 21:30:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:08,245 INFO L225 Difference]: With dead ends: 546 [2021-06-05 21:30:08,245 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 21:30:08,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 21:30:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-06-05 21:30:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 21:30:08,248 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 21:30:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:08,249 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 21:30:08,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 21:30:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:08,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:08,249 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:08,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9257 [2021-06-05 21:30:08,465 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-06-05 21:30:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134125328] [2021-06-05 21:30:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:08,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:08,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134125328] [2021-06-05 21:30:08,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134125328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:08,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203420356] [2021-06-05 21:30:08,727 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 21:30:08,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:08,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:08,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203420356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:08,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:08,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:08,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680732871] [2021-06-05 21:30:08,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:08,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:08,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:08,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:08,794 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:08,985 INFO L93 Difference]: Finished difference Result 544 states and 1360 transitions. [2021-06-05 21:30:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:09,002 INFO L225 Difference]: With dead ends: 544 [2021-06-05 21:30:09,002 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 21:30:09,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 21:30:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-06-05 21:30:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-06-05 21:30:09,006 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-06-05 21:30:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:09,006 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-06-05 21:30:09,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-06-05 21:30:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:09,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:09,006 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:09,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9258 [2021-06-05 21:30:09,222 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-06-05 21:30:09,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:09,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011955620] [2021-06-05 21:30:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:09,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011955620] [2021-06-05 21:30:09,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011955620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456992080] [2021-06-05 21:30:09,319 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 21:30:09,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:09,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 21:30:09,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:09,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:09,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:10,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:10,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:10,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:10,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:10,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456992080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:10,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:10,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090454583] [2021-06-05 21:30:10,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:10,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:10,010 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:10,390 INFO L93 Difference]: Finished difference Result 365 states and 1058 transitions. [2021-06-05 21:30:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:10,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:10,391 INFO L225 Difference]: With dead ends: 365 [2021-06-05 21:30:10,391 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 21:30:10,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 21:30:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-06-05 21:30:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-06-05 21:30:10,395 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-06-05 21:30:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:10,395 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-06-05 21:30:10,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-06-05 21:30:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:10,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:10,395 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:10,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9259,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:10,612 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:10,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-06-05 21:30:10,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:10,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600035017] [2021-06-05 21:30:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:10,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:10,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600035017] [2021-06-05 21:30:10,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600035017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:10,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753675328] [2021-06-05 21:30:10,705 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 21:30:10,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:10,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:10,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:10,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:11,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:11,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:11,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:11,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:11,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753675328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:11,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:11,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:11,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872608713] [2021-06-05 21:30:11,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:11,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:11,890 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:12,235 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-06-05 21:30:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:30:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:12,236 INFO L225 Difference]: With dead ends: 375 [2021-06-05 21:30:12,236 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 21:30:12,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:30:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 21:30:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-06-05 21:30:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-06-05 21:30:12,239 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-06-05 21:30:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:12,240 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-06-05 21:30:12,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-06-05 21:30:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:12,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:12,240 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:12,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9355 [2021-06-05 21:30:12,450 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:12,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-06-05 21:30:12,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:12,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174455443] [2021-06-05 21:30:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:12,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:12,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174455443] [2021-06-05 21:30:12,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174455443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:12,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611617128] [2021-06-05 21:30:12,486 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 21:30:12,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:12,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:12,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:12,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611617128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:12,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:12,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:12,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234439984] [2021-06-05 21:30:12,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:12,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:12,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:12,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:12,536 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:12,585 INFO L93 Difference]: Finished difference Result 498 states and 1262 transitions. [2021-06-05 21:30:12,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:30:12,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 21:30:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:12,587 INFO L225 Difference]: With dead ends: 498 [2021-06-05 21:30:12,587 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 21:30:12,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 21:30:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-06-05 21:30:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-06-05 21:30:12,591 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-06-05 21:30:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:12,591 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-06-05 21:30:12,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-06-05 21:30:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:12,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:12,591 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:12,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9540 [2021-06-05 21:30:12,808 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-06-05 21:30:12,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:12,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371392340] [2021-06-05 21:30:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:12,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:12,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371392340] [2021-06-05 21:30:12,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371392340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:12,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144133859] [2021-06-05 21:30:12,839 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 21:30:12,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:12,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:12,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144133859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:12,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:12,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:12,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351167856] [2021-06-05 21:30:12,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:12,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:12,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:12,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:12,888 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:12,929 INFO L93 Difference]: Finished difference Result 440 states and 1150 transitions. [2021-06-05 21:30:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:30:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 21:30:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:12,930 INFO L225 Difference]: With dead ends: 440 [2021-06-05 21:30:12,930 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 21:30:12,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 21:30:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-06-05 21:30:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-06-05 21:30:12,933 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-06-05 21:30:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:12,933 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-06-05 21:30:12,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-06-05 21:30:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:12,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:12,934 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:13,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9541 [2021-06-05 21:30:13,135 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-06-05 21:30:13,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:13,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979309143] [2021-06-05 21:30:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:13,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:13,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979309143] [2021-06-05 21:30:13,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979309143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:13,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801675024] [2021-06-05 21:30:13,238 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 21:30:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:13,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:14,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:14,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:14,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:14,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:14,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801675024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:14,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:14,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:14,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387365265] [2021-06-05 21:30:14,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:14,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:14,229 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:14,516 INFO L93 Difference]: Finished difference Result 386 states and 1061 transitions. [2021-06-05 21:30:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:14,517 INFO L225 Difference]: With dead ends: 386 [2021-06-05 21:30:14,517 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 21:30:14,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 21:30:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-06-05 21:30:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-06-05 21:30:14,521 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-06-05 21:30:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:14,521 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-06-05 21:30:14,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-06-05 21:30:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:14,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:14,521 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:14,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9542,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:14,722 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-06-05 21:30:14,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:14,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153456991] [2021-06-05 21:30:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:14,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:14,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153456991] [2021-06-05 21:30:14,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153456991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:14,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994294695] [2021-06-05 21:30:14,761 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 21:30:14,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:14,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:14,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994294695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:14,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:14,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10149818] [2021-06-05 21:30:14,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:14,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:14,815 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:14,905 INFO L93 Difference]: Finished difference Result 472 states and 1196 transitions. [2021-06-05 21:30:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:30:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:14,909 INFO L225 Difference]: With dead ends: 472 [2021-06-05 21:30:14,909 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 21:30:14,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 21:30:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-06-05 21:30:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-06-05 21:30:14,913 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-06-05 21:30:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:14,913 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-06-05 21:30:14,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-06-05 21:30:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:14,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:14,913 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:15,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9701,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:15,129 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-06-05 21:30:15,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:15,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433397052] [2021-06-05 21:30:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433397052] [2021-06-05 21:30:15,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433397052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968086123] [2021-06-05 21:30:15,177 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 21:30:15,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:30:15,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:15,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:15,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:15,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968086123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:15,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:15,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:15,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537588932] [2021-06-05 21:30:15,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:15,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:15,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:15,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:15,236 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:15,364 INFO L93 Difference]: Finished difference Result 490 states and 1202 transitions. [2021-06-05 21:30:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:15,365 INFO L225 Difference]: With dead ends: 490 [2021-06-05 21:30:15,365 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 21:30:15,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 21:30:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-06-05 21:30:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-06-05 21:30:15,368 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-06-05 21:30:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:15,368 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-06-05 21:30:15,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-06-05 21:30:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:15,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:15,369 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:15,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9702,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:15,569 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-06-05 21:30:15,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:15,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798928385] [2021-06-05 21:30:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:15,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:15,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798928385] [2021-06-05 21:30:15,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798928385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:15,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854365194] [2021-06-05 21:30:15,619 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 21:30:15,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:15,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:15,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854365194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:15,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:15,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:15,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566679342] [2021-06-05 21:30:15,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:15,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:15,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:15,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:15,684 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:15,843 INFO L93 Difference]: Finished difference Result 433 states and 1094 transitions. [2021-06-05 21:30:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:15,844 INFO L225 Difference]: With dead ends: 433 [2021-06-05 21:30:15,844 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 21:30:15,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 21:30:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-06-05 21:30:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 21:30:15,848 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-06-05 21:30:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:15,848 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 21:30:15,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 21:30:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:15,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:15,848 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:16,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9703,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:16,049 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-06-05 21:30:16,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:16,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868193668] [2021-06-05 21:30:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:16,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868193668] [2021-06-05 21:30:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868193668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:16,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837259027] [2021-06-05 21:30:16,101 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 21:30:16,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:30:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:16,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837259027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:16,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:16,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:16,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133600213] [2021-06-05 21:30:16,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:16,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:16,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:16,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:16,157 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:16,328 INFO L93 Difference]: Finished difference Result 474 states and 1217 transitions. [2021-06-05 21:30:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:16,329 INFO L225 Difference]: With dead ends: 474 [2021-06-05 21:30:16,329 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 21:30:16,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 21:30:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-06-05 21:30:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-06-05 21:30:16,333 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-06-05 21:30:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:16,333 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-06-05 21:30:16,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-06-05 21:30:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:16,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:16,333 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:16,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9704,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:16,534 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-06-05 21:30:16,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:16,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061729489] [2021-06-05 21:30:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:16,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:16,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061729489] [2021-06-05 21:30:16,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061729489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:16,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531496277] [2021-06-05 21:30:16,629 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 21:30:16,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:16,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:16,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:16,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:16,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:16,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:17,946 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 230 [2021-06-05 21:30:18,051 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 234 [2021-06-05 21:30:18,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:18,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:18,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:18,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:18,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531496277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:18,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:18,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:18,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020734014] [2021-06-05 21:30:18,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:18,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:18,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:18,274 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:18,721 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2021-06-05 21:30:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:18,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:18,721 INFO L225 Difference]: With dead ends: 381 [2021-06-05 21:30:18,721 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 21:30:18,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 21:30:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-06-05 21:30:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-06-05 21:30:18,725 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-06-05 21:30:18,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:18,725 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-06-05 21:30:18,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:18,725 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-06-05 21:30:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:18,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:18,726 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:18,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9705 [2021-06-05 21:30:18,926 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:18,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-06-05 21:30:18,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:18,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071594812] [2021-06-05 21:30:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:19,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:19,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071594812] [2021-06-05 21:30:19,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071594812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:19,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135815137] [2021-06-05 21:30:19,038 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 21:30:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:19,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:19,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:20,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:20,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:20,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:20,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:20,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135815137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:20,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:20,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:20,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603073012] [2021-06-05 21:30:20,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:20,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:20,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:20,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:20,343 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:20,783 INFO L93 Difference]: Finished difference Result 396 states and 1134 transitions. [2021-06-05 21:30:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:30:20,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:20,784 INFO L225 Difference]: With dead ends: 396 [2021-06-05 21:30:20,784 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 21:30:20,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:30:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 21:30:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-06-05 21:30:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-06-05 21:30:20,788 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-06-05 21:30:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:20,788 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-06-05 21:30:20,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-06-05 21:30:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:20,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:20,788 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:20,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:20,989 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:20,989 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-06-05 21:30:20,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:20,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738489954] [2021-06-05 21:30:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:21,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738489954] [2021-06-05 21:30:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738489954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788969533] [2021-06-05 21:30:21,032 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 21:30:21,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:21,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:21,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788969533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:21,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:21,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:21,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336503589] [2021-06-05 21:30:21,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:21,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:21,083 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:21,140 INFO L93 Difference]: Finished difference Result 539 states and 1358 transitions. [2021-06-05 21:30:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:30:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:21,141 INFO L225 Difference]: With dead ends: 539 [2021-06-05 21:30:21,141 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 21:30:21,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:30:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 21:30:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-06-05 21:30:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-06-05 21:30:21,159 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-06-05 21:30:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:21,159 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-06-05 21:30:21,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-06-05 21:30:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:21,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:21,160 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:21,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10133 [2021-06-05 21:30:21,360 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-06-05 21:30:21,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:21,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974390334] [2021-06-05 21:30:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:21,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:21,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974390334] [2021-06-05 21:30:21,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974390334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:21,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334962243] [2021-06-05 21:30:21,402 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 21:30:21,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:21,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:21,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:21,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334962243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:21,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:21,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:21,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267404200] [2021-06-05 21:30:21,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:21,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:21,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:21,453 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:21,516 INFO L93 Difference]: Finished difference Result 516 states and 1352 transitions. [2021-06-05 21:30:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:30:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:21,516 INFO L225 Difference]: With dead ends: 516 [2021-06-05 21:30:21,517 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 21:30:21,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 21:30:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-06-05 21:30:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-06-05 21:30:21,521 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-06-05 21:30:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:21,521 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-06-05 21:30:21,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-06-05 21:30:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:21,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:21,521 INFO L554 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:21,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10134 [2021-06-05 21:30:21,722 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:21,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:21,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-06-05 21:30:21,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:21,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165810862] [2021-06-05 21:30:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:21,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:21,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165810862] [2021-06-05 21:30:21,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165810862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:21,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268619551] [2021-06-05 21:30:21,816 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 21:30:21,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:21,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:21,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 21:30:21,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:22,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:22,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 21:30:22,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:22,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:22,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:22,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 21:30:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:22,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268619551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:22,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:22,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 21:30:22,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130475747] [2021-06-05 21:30:22,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:30:22,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:22,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:30:22,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:22,490 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:22,727 INFO L93 Difference]: Finished difference Result 420 states and 1201 transitions. [2021-06-05 21:30:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:30:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:22,728 INFO L225 Difference]: With dead ends: 420 [2021-06-05 21:30:22,728 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 21:30:22,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:30:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 21:30:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-06-05 21:30:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-06-05 21:30:22,732 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-06-05 21:30:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:22,732 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-06-05 21:30:22,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-06-05 21:30:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:22,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:22,732 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:22,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10135 [2021-06-05 21:30:22,937 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-06-05 21:30:22,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:22,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066687379] [2021-06-05 21:30:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:22,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:22,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066687379] [2021-06-05 21:30:22,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066687379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:22,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092508494] [2021-06-05 21:30:22,993 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 21:30:23,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:23,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:23,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092508494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:23,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:23,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:23,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331073623] [2021-06-05 21:30:23,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:23,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:23,043 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:23,096 INFO L93 Difference]: Finished difference Result 489 states and 1363 transitions. [2021-06-05 21:30:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:30:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:23,097 INFO L225 Difference]: With dead ends: 489 [2021-06-05 21:30:23,097 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 21:30:23,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:30:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 21:30:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-06-05 21:30:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-06-05 21:30:23,102 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-06-05 21:30:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:23,102 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-06-05 21:30:23,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-06-05 21:30:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:23,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:23,102 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:23,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10244 [2021-06-05 21:30:23,303 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-06-05 21:30:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:23,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499908112] [2021-06-05 21:30:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:23,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:23,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499908112] [2021-06-05 21:30:23,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499908112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:23,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16133920] [2021-06-05 21:30:23,402 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 21:30:23,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16133920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:23,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:23,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801646914] [2021-06-05 21:30:23,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:23,458 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:23,558 INFO L93 Difference]: Finished difference Result 521 states and 1410 transitions. [2021-06-05 21:30:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:30:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:23,558 INFO L225 Difference]: With dead ends: 521 [2021-06-05 21:30:23,558 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 21:30:23,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 21:30:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-06-05 21:30:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-06-05 21:30:23,563 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-06-05 21:30:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:23,563 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-06-05 21:30:23,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-06-05 21:30:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:23,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:23,563 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:23,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10245 [2021-06-05 21:30:23,769 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-06-05 21:30:23,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:23,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946892302] [2021-06-05 21:30:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:23,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:23,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946892302] [2021-06-05 21:30:23,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946892302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:23,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517156732] [2021-06-05 21:30:23,809 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 21:30:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:23,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:23,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517156732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:23,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:23,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:23,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83103580] [2021-06-05 21:30:23,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:23,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:23,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:23,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:23,864 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:23,993 INFO L93 Difference]: Finished difference Result 501 states and 1377 transitions. [2021-06-05 21:30:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:30:23,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:23,993 INFO L225 Difference]: With dead ends: 501 [2021-06-05 21:30:23,994 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 21:30:23,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 21:30:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-06-05 21:30:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-06-05 21:30:23,998 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-06-05 21:30:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:23,998 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-06-05 21:30:23,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-06-05 21:30:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:23,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:23,999 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:24,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10246 [2021-06-05 21:30:24,199 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-06-05 21:30:24,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:24,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082996855] [2021-06-05 21:30:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:24,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:24,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082996855] [2021-06-05 21:30:24,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082996855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:24,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786059453] [2021-06-05 21:30:24,247 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 21:30:24,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:24,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786059453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:24,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:24,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:24,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948890160] [2021-06-05 21:30:24,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:24,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:24,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:24,306 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:24,454 INFO L93 Difference]: Finished difference Result 512 states and 1422 transitions. [2021-06-05 21:30:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:24,455 INFO L225 Difference]: With dead ends: 512 [2021-06-05 21:30:24,455 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 21:30:24,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:30:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 21:30:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-06-05 21:30:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-06-05 21:30:24,459 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-06-05 21:30:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:24,459 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-06-05 21:30:24,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-06-05 21:30:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:30:24,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:24,460 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:24,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:24,660 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-06-05 21:30:24,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:24,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241120782] [2021-06-05 21:30:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:24,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:24,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241120782] [2021-06-05 21:30:24,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241120782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:24,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567758853] [2021-06-05 21:30:24,714 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 21:30:24,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:24,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:30:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:24,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567758853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:24,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:24,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246397954] [2021-06-05 21:30:24,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:24,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:24,780 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:24,927 INFO L93 Difference]: Finished difference Result 594 states and 1635 transitions. [2021-06-05 21:30:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:30:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:24,928 INFO L225 Difference]: With dead ends: 594 [2021-06-05 21:30:24,928 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 21:30:24,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 21:30:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-06-05 21:30:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-06-05 21:30:24,949 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-06-05 21:30:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:24,949 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-06-05 21:30:24,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-06-05 21:30:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:24,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:24,949 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:25,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-06-05 21:30:25,150 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-06-05 21:30:25,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:25,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070241375] [2021-06-05 21:30:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:25,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070241375] [2021-06-05 21:30:25,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070241375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443977330] [2021-06-05 21:30:25,204 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 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 21:30:25,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:25,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443977330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:25,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:25,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313372119] [2021-06-05 21:30:25,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:25,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:25,277 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:25,417 INFO L93 Difference]: Finished difference Result 532 states and 1448 transitions. [2021-06-05 21:30:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:30:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:25,418 INFO L225 Difference]: With dead ends: 532 [2021-06-05 21:30:25,418 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 21:30:25,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 21:30:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-06-05 21:30:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-06-05 21:30:25,422 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-06-05 21:30:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:25,422 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-06-05 21:30:25,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-06-05 21:30:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:25,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:25,423 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:25,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10249 [2021-06-05 21:30:25,623 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-06-05 21:30:25,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:25,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857337918] [2021-06-05 21:30:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:25,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857337918] [2021-06-05 21:30:25,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857337918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478742152] [2021-06-05 21:30:25,678 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 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 21:30:25,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:25,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478742152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:25,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077425931] [2021-06-05 21:30:25,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:25,729 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:25,924 INFO L93 Difference]: Finished difference Result 606 states and 1593 transitions. [2021-06-05 21:30:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:25,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:25,925 INFO L225 Difference]: With dead ends: 606 [2021-06-05 21:30:25,925 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 21:30:25,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 21:30:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-06-05 21:30:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-06-05 21:30:25,930 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-06-05 21:30:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:25,930 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-06-05 21:30:25,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-06-05 21:30:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:25,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:25,931 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:26,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:26,131 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:26,132 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-06-05 21:30:26,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:26,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483305885] [2021-06-05 21:30:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:26,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:26,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483305885] [2021-06-05 21:30:26,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483305885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:26,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985225180] [2021-06-05 21:30:26,174 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 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 21:30:26,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:26,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:26,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985225180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:26,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:26,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:26,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016934691] [2021-06-05 21:30:26,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:26,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:26,226 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:26,348 INFO L93 Difference]: Finished difference Result 466 states and 1355 transitions. [2021-06-05 21:30:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:26,349 INFO L225 Difference]: With dead ends: 466 [2021-06-05 21:30:26,349 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 21:30:26,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 21:30:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-06-05 21:30:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-06-05 21:30:26,355 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-06-05 21:30:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:26,356 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-06-05 21:30:26,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-06-05 21:30:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:26,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:26,356 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:26,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:26,557 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-06-05 21:30:26,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:26,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790085815] [2021-06-05 21:30:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:26,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:26,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790085815] [2021-06-05 21:30:26,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790085815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:26,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915896676] [2021-06-05 21:30:26,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:26,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915896676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:26,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:26,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:26,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221421930] [2021-06-05 21:30:26,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:26,654 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:26,707 INFO L93 Difference]: Finished difference Result 597 states and 1562 transitions. [2021-06-05 21:30:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:30:26,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:26,708 INFO L225 Difference]: With dead ends: 597 [2021-06-05 21:30:26,708 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 21:30:26,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 21:30:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-06-05 21:30:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-06-05 21:30:26,712 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-06-05 21:30:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:26,712 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-06-05 21:30:26,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-06-05 21:30:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:26,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:26,713 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:26,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:26,913 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:26,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-06-05 21:30:26,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:26,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261834828] [2021-06-05 21:30:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:26,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:26,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261834828] [2021-06-05 21:30:26,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261834828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:26,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047313125] [2021-06-05 21:30:26,955 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 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 21:30:26,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:26,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:27,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047313125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:27,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:27,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:27,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204661479] [2021-06-05 21:30:27,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:27,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:27,008 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:27,121 INFO L93 Difference]: Finished difference Result 489 states and 1403 transitions. [2021-06-05 21:30:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:27,122 INFO L225 Difference]: With dead ends: 489 [2021-06-05 21:30:27,122 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 21:30:27,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 21:30:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-06-05 21:30:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-06-05 21:30:27,127 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-06-05 21:30:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:27,127 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-06-05 21:30:27,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-06-05 21:30:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:27,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:27,127 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:27,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:27,341 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-06-05 21:30:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:27,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658748913] [2021-06-05 21:30:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:27,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:27,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658748913] [2021-06-05 21:30:27,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658748913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:27,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092295239] [2021-06-05 21:30:27,396 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 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 21:30:27,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:27,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:27,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092295239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:27,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:27,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:27,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112110800] [2021-06-05 21:30:27,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:27,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:27,457 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:27,531 INFO L93 Difference]: Finished difference Result 636 states and 1639 transitions. [2021-06-05 21:30:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:30:27,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:27,532 INFO L225 Difference]: With dead ends: 636 [2021-06-05 21:30:27,532 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 21:30:27,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:27,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 21:30:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-06-05 21:30:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-06-05 21:30:27,537 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-06-05 21:30:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:27,537 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-06-05 21:30:27,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-06-05 21:30:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:27,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:27,538 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:27,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-06-05 21:30:27,753 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-06-05 21:30:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:27,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526574682] [2021-06-05 21:30:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:27,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:27,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526574682] [2021-06-05 21:30:27,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526574682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:27,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23314625] [2021-06-05 21:30:27,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:27,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:27,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:27,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:27,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23314625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:27,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:27,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:27,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868210299] [2021-06-05 21:30:27,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:27,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:27,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:27,875 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:27,967 INFO L93 Difference]: Finished difference Result 488 states and 1377 transitions. [2021-06-05 21:30:27,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:27,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:27,968 INFO L225 Difference]: With dead ends: 488 [2021-06-05 21:30:27,968 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 21:30:27,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 21:30:27,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-06-05 21:30:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-06-05 21:30:27,972 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-06-05 21:30:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:27,972 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-06-05 21:30:27,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-06-05 21:30:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:27,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:27,973 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:28,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10255 [2021-06-05 21:30:28,175 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-06-05 21:30:28,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:28,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454826508] [2021-06-05 21:30:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:28,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:28,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454826508] [2021-06-05 21:30:28,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454826508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:28,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723817586] [2021-06-05 21:30:28,222 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 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 21:30:28,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:28,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:28,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723817586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:28,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:28,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:30:28,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124499418] [2021-06-05 21:30:28,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:28,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:28,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:28,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:28,292 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:28,380 INFO L93 Difference]: Finished difference Result 668 states and 1705 transitions. [2021-06-05 21:30:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:28,381 INFO L225 Difference]: With dead ends: 668 [2021-06-05 21:30:28,381 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 21:30:28,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 21:30:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-06-05 21:30:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-06-05 21:30:28,386 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-06-05 21:30:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:28,386 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-06-05 21:30:28,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-06-05 21:30:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:28,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:28,387 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:28,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10256 [2021-06-05 21:30:28,587 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-06-05 21:30:28,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:28,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198329395] [2021-06-05 21:30:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:28,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:28,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198329395] [2021-06-05 21:30:28,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198329395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:28,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316683597] [2021-06-05 21:30:28,639 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 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 21:30:28,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:28,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316683597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:28,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:28,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:28,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100804041] [2021-06-05 21:30:28,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:28,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:28,690 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:28,774 INFO L93 Difference]: Finished difference Result 521 states and 1480 transitions. [2021-06-05 21:30:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:28,775 INFO L225 Difference]: With dead ends: 521 [2021-06-05 21:30:28,775 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 21:30:28,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 21:30:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-06-05 21:30:28,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-06-05 21:30:28,779 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-06-05 21:30:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:28,779 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-06-05 21:30:28,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-06-05 21:30:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:28,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:28,780 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:28,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10257 [2021-06-05 21:30:28,997 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-06-05 21:30:28,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:28,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933347668] [2021-06-05 21:30:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:29,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933347668] [2021-06-05 21:30:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933347668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569907700] [2021-06-05 21:30:29,039 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 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 21:30:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:29,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:29,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569907700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:29,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:29,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:29,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056645244] [2021-06-05 21:30:29,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:29,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:29,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:29,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:29,091 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:29,241 INFO L93 Difference]: Finished difference Result 690 states and 1758 transitions. [2021-06-05 21:30:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:29,242 INFO L225 Difference]: With dead ends: 690 [2021-06-05 21:30:29,242 INFO L226 Difference]: Without dead ends: 690 [2021-06-05 21:30:29,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-05 21:30:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-06-05 21:30:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-06-05 21:30:29,246 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-06-05 21:30:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:29,246 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-06-05 21:30:29,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-06-05 21:30:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:29,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:29,247 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:29,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10258 [2021-06-05 21:30:29,451 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-06-05 21:30:29,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:29,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841564397] [2021-06-05 21:30:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:29,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:29,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841564397] [2021-06-05 21:30:29,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841564397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:29,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131362962] [2021-06-05 21:30:29,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:29,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:29,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:29,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:29,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131362962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:29,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:29,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:30:29,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890054836] [2021-06-05 21:30:29,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:30:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:30:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:30:29,535 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:29,598 INFO L93 Difference]: Finished difference Result 587 states and 1642 transitions. [2021-06-05 21:30:29,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:30:29,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:29,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:29,599 INFO L225 Difference]: With dead ends: 587 [2021-06-05 21:30:29,600 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 21:30:29,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 21:30:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-06-05 21:30:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-06-05 21:30:29,604 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-06-05 21:30:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:29,604 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-06-05 21:30:29,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-06-05 21:30:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:29,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:29,605 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:29,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:29,819 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-06-05 21:30:29,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:29,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601807167] [2021-06-05 21:30:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:29,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:29,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601807167] [2021-06-05 21:30:29,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601807167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:29,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670480749] [2021-06-05 21:30:29,855 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 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 21:30:29,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:29,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:29,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670480749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:29,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:29,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:30:29,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691631021] [2021-06-05 21:30:29,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:30:29,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:30:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:30:29,904 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:29,996 INFO L93 Difference]: Finished difference Result 581 states and 1594 transitions. [2021-06-05 21:30:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:30:29,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:29,997 INFO L225 Difference]: With dead ends: 581 [2021-06-05 21:30:29,997 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 21:30:29,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:30:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 21:30:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-06-05 21:30:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-06-05 21:30:30,002 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-06-05 21:30:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:30,002 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-06-05 21:30:30,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-06-05 21:30:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:30,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:30,003 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:30,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10260,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:30,219 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-06-05 21:30:30,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:30,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713673368] [2021-06-05 21:30:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:30,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:30,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713673368] [2021-06-05 21:30:30,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713673368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618757092] [2021-06-05 21:30:30,250 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 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 21:30:30,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:30,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618757092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:30,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:30,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634857077] [2021-06-05 21:30:30,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:30,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:30,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:30,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:30,302 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:30,361 INFO L93 Difference]: Finished difference Result 595 states and 1618 transitions. [2021-06-05 21:30:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:30:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 21:30:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:30,362 INFO L225 Difference]: With dead ends: 595 [2021-06-05 21:30:30,362 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 21:30:30,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 21:30:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-06-05 21:30:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-06-05 21:30:30,367 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-06-05 21:30:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:30,367 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-06-05 21:30:30,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-06-05 21:30:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:30,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:30,367 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:30,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:30,581 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-06-05 21:30:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:30,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557287202] [2021-06-05 21:30:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:30,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557287202] [2021-06-05 21:30:30,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557287202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517029516] [2021-06-05 21:30:30,618 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 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 21:30:30,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:30:30,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:30,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517029516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:30,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:30,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361903791] [2021-06-05 21:30:30,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:30,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:30,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:30,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:30,684 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:30,770 INFO L93 Difference]: Finished difference Result 631 states and 1678 transitions. [2021-06-05 21:30:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:30:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:30,771 INFO L225 Difference]: With dead ends: 631 [2021-06-05 21:30:30,771 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 21:30:30,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 21:30:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-06-05 21:30:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-06-05 21:30:30,778 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-06-05 21:30:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:30,778 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-06-05 21:30:30,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-06-05 21:30:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:30,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:30,779 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:30,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10262,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:30,989 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-06-05 21:30:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439445049] [2021-06-05 21:30:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:31,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:31,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439445049] [2021-06-05 21:30:31,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439445049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:31,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873300057] [2021-06-05 21:30:31,045 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 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 21:30:31,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:31,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:31,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:31,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873300057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:31,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:31,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496598094] [2021-06-05 21:30:31,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:31,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:31,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:31,113 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:31,230 INFO L93 Difference]: Finished difference Result 578 states and 1659 transitions. [2021-06-05 21:30:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:31,231 INFO L225 Difference]: With dead ends: 578 [2021-06-05 21:30:31,231 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 21:30:31,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 21:30:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-06-05 21:30:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-06-05 21:30:31,236 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-06-05 21:30:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:31,237 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-06-05 21:30:31,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-06-05 21:30:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:31,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:31,237 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:31,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10263 [2021-06-05 21:30:31,438 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:31,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-06-05 21:30:31,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:31,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370158495] [2021-06-05 21:30:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:31,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370158495] [2021-06-05 21:30:31,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370158495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355312543] [2021-06-05 21:30:31,483 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 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 21:30:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:31,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355312543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:31,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:31,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:31,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965241570] [2021-06-05 21:30:31,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:31,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:31,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:31,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:31,549 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:31,695 INFO L93 Difference]: Finished difference Result 678 states and 1771 transitions. [2021-06-05 21:30:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:31,696 INFO L225 Difference]: With dead ends: 678 [2021-06-05 21:30:31,696 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 21:30:31,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 21:30:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-06-05 21:30:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-06-05 21:30:31,701 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-06-05 21:30:31,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:31,701 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-06-05 21:30:31,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:31,701 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-06-05 21:30:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:31,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:31,701 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:31,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10264 [2021-06-05 21:30:31,917 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-06-05 21:30:31,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:31,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832373691] [2021-06-05 21:30:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:31,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:31,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832373691] [2021-06-05 21:30:31,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832373691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:31,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489233707] [2021-06-05 21:30:31,966 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 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 21:30:31,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:32,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489233707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:32,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:32,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063795098] [2021-06-05 21:30:32,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:32,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:32,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:32,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:32,021 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:32,123 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-06-05 21:30:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:32,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:32,124 INFO L225 Difference]: With dead ends: 606 [2021-06-05 21:30:32,124 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 21:30:32,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 21:30:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-06-05 21:30:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-06-05 21:30:32,129 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-06-05 21:30:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:32,129 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-06-05 21:30:32,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-06-05 21:30:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:32,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:32,130 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:32,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10265,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:32,330 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-06-05 21:30:32,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:32,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570294197] [2021-06-05 21:30:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:32,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570294197] [2021-06-05 21:30:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570294197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536433877] [2021-06-05 21:30:32,379 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 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 21:30:32,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:32,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:32,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:32,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:32,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536433877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:32,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:32,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:32,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058865066] [2021-06-05 21:30:32,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:32,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:32,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:32,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:32,454 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:32,650 INFO L93 Difference]: Finished difference Result 741 states and 1915 transitions. [2021-06-05 21:30:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:30:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:32,652 INFO L225 Difference]: With dead ends: 741 [2021-06-05 21:30:32,652 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 21:30:32,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:30:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 21:30:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-06-05 21:30:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-06-05 21:30:32,657 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-06-05 21:30:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:32,657 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-06-05 21:30:32,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-06-05 21:30:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:32,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:32,657 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:32,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10266 [2021-06-05 21:30:32,858 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-06-05 21:30:32,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:32,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347382940] [2021-06-05 21:30:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:32,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:32,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347382940] [2021-06-05 21:30:32,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347382940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:32,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522668883] [2021-06-05 21:30:32,900 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 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 21:30:32,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:32,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522668883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:32,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:32,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:32,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406846004] [2021-06-05 21:30:32,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:32,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:32,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:32,953 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:33,019 INFO L93 Difference]: Finished difference Result 658 states and 1841 transitions. [2021-06-05 21:30:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:30:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 21:30:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:33,020 INFO L225 Difference]: With dead ends: 658 [2021-06-05 21:30:33,020 INFO L226 Difference]: Without dead ends: 658 [2021-06-05 21:30:33,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:33,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-05 21:30:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-06-05 21:30:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-06-05 21:30:33,026 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-06-05 21:30:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:33,026 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-06-05 21:30:33,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-06-05 21:30:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:33,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:33,026 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:33,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10267 [2021-06-05 21:30:33,228 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-06-05 21:30:33,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:33,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999758552] [2021-06-05 21:30:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:33,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:33,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999758552] [2021-06-05 21:30:33,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999758552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:33,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4903128] [2021-06-05 21:30:33,285 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 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 21:30:33,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:33,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:33,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:33,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4903128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:33,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:33,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:33,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045265559] [2021-06-05 21:30:33,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:33,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:33,334 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:33,436 INFO L93 Difference]: Finished difference Result 668 states and 1844 transitions. [2021-06-05 21:30:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:30:33,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 21:30:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:33,437 INFO L225 Difference]: With dead ends: 668 [2021-06-05 21:30:33,437 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 21:30:33,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 21:30:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-06-05 21:30:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-06-05 21:30:33,443 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-06-05 21:30:33,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:33,443 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-06-05 21:30:33,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-06-05 21:30:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:33,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:33,444 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:33,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10268 [2021-06-05 21:30:33,644 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-06-05 21:30:33,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:33,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380560369] [2021-06-05 21:30:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:33,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:33,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380560369] [2021-06-05 21:30:33,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380560369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:33,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924126594] [2021-06-05 21:30:33,676 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 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 21:30:33,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:33,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924126594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:33,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:33,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:33,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687008058] [2021-06-05 21:30:33,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:33,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:33,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:33,725 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:33,808 INFO L93 Difference]: Finished difference Result 664 states and 1886 transitions. [2021-06-05 21:30:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:30:33,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 21:30:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:33,809 INFO L225 Difference]: With dead ends: 664 [2021-06-05 21:30:33,809 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 21:30:33,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 21:30:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-06-05 21:30:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-06-05 21:30:33,814 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-06-05 21:30:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:33,815 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-06-05 21:30:33,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-06-05 21:30:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:33,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:33,815 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:34,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10269,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:34,016 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:34,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-06-05 21:30:34,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:34,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507223354] [2021-06-05 21:30:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:34,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:34,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507223354] [2021-06-05 21:30:34,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507223354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061561813] [2021-06-05 21:30:34,046 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 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 21:30:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:34,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:34,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:34,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061561813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:34,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:30:34,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163625901] [2021-06-05 21:30:34,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:30:34,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:30:34,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:30:34,099 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:34,147 INFO L93 Difference]: Finished difference Result 657 states and 1827 transitions. [2021-06-05 21:30:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:30:34,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-06-05 21:30:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:34,148 INFO L225 Difference]: With dead ends: 657 [2021-06-05 21:30:34,148 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 21:30:34,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 21:30:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-06-05 21:30:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-06-05 21:30:34,153 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-06-05 21:30:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:34,153 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-06-05 21:30:34,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:30:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-06-05 21:30:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:34,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:34,154 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:34,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10270 [2021-06-05 21:30:34,368 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:34,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:34,368 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-06-05 21:30:34,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:34,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724072284] [2021-06-05 21:30:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:34,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:34,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724072284] [2021-06-05 21:30:34,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724072284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988049768] [2021-06-05 21:30:34,427 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 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 21:30:34,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:34,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:34,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988049768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:34,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:34,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163515942] [2021-06-05 21:30:34,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:34,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:34,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:34,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:34,482 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:34,558 INFO L93 Difference]: Finished difference Result 654 states and 1817 transitions. [2021-06-05 21:30:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:30:34,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:34,559 INFO L225 Difference]: With dead ends: 654 [2021-06-05 21:30:34,559 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 21:30:34,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 21:30:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-06-05 21:30:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-06-05 21:30:34,565 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-06-05 21:30:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:34,565 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-06-05 21:30:34,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-06-05 21:30:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:34,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:34,565 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:34,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10271,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:34,766 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-06-05 21:30:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:34,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9822159] [2021-06-05 21:30:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:34,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:34,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9822159] [2021-06-05 21:30:34,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9822159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149319600] [2021-06-05 21:30:34,821 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 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 21:30:34,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:34,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149319600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:34,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:34,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109028991] [2021-06-05 21:30:34,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:34,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:34,871 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:34,992 INFO L93 Difference]: Finished difference Result 678 states and 1970 transitions. [2021-06-05 21:30:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:34,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:34,993 INFO L225 Difference]: With dead ends: 678 [2021-06-05 21:30:34,993 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 21:30:34,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 21:30:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-06-05 21:30:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-06-05 21:30:34,999 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-06-05 21:30:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:34,999 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-06-05 21:30:34,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-06-05 21:30:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:34,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:35,000 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:35,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10272,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:35,200 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-06-05 21:30:35,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:35,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212988477] [2021-06-05 21:30:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:35,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:35,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212988477] [2021-06-05 21:30:35,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212988477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:35,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767210061] [2021-06-05 21:30:35,240 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 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 21:30:35,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:35,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:35,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:35,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767210061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:35,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:35,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911169005] [2021-06-05 21:30:35,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:35,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:35,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:35,291 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:35,404 INFO L93 Difference]: Finished difference Result 717 states and 1973 transitions. [2021-06-05 21:30:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:35,405 INFO L225 Difference]: With dead ends: 717 [2021-06-05 21:30:35,405 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 21:30:35,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 21:30:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-06-05 21:30:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-06-05 21:30:35,411 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-06-05 21:30:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:35,411 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-06-05 21:30:35,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-06-05 21:30:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:35,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:35,411 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:35,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10273,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:35,612 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:35,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:35,612 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-06-05 21:30:35,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:35,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934627] [2021-06-05 21:30:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:35,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:35,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934627] [2021-06-05 21:30:35,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:35,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519717824] [2021-06-05 21:30:35,663 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 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 21:30:35,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:35,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:35,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:35,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519717824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:35,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:35,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:35,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978939076] [2021-06-05 21:30:35,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:35,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:35,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:35,724 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:35,847 INFO L93 Difference]: Finished difference Result 704 states and 2024 transitions. [2021-06-05 21:30:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:35,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:35,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:35,848 INFO L225 Difference]: With dead ends: 704 [2021-06-05 21:30:35,848 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 21:30:35,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 21:30:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-06-05 21:30:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-06-05 21:30:35,854 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-06-05 21:30:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:35,855 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-06-05 21:30:35,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-06-05 21:30:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:35,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:35,855 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:36,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10274,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:36,056 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-06-05 21:30:36,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:36,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016203368] [2021-06-05 21:30:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:36,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016203368] [2021-06-05 21:30:36,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016203368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949566536] [2021-06-05 21:30:36,101 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 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 21:30:36,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:30:36,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949566536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:36,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:36,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12233843] [2021-06-05 21:30:36,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:36,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:36,159 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:36,333 INFO L93 Difference]: Finished difference Result 763 states and 2067 transitions. [2021-06-05 21:30:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:36,334 INFO L225 Difference]: With dead ends: 763 [2021-06-05 21:30:36,334 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 21:30:36,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:30:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 21:30:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-06-05 21:30:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-06-05 21:30:36,340 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-06-05 21:30:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:36,340 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-06-05 21:30:36,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-06-05 21:30:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:36,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:36,340 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:36,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10275 [2021-06-05 21:30:36,541 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-06-05 21:30:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:36,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850760710] [2021-06-05 21:30:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:36,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850760710] [2021-06-05 21:30:36,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850760710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741313978] [2021-06-05 21:30:36,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741313978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:36,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:36,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87109651] [2021-06-05 21:30:36,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:36,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:36,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:36,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:36,643 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:36,702 INFO L93 Difference]: Finished difference Result 610 states and 1818 transitions. [2021-06-05 21:30:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:36,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:36,704 INFO L225 Difference]: With dead ends: 610 [2021-06-05 21:30:36,704 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 21:30:36,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 21:30:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-06-05 21:30:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-06-05 21:30:36,709 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-06-05 21:30:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:36,709 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-06-05 21:30:36,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-06-05 21:30:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:36,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:36,710 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:36,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10276 [2021-06-05 21:30:36,926 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-06-05 21:30:36,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:36,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358481312] [2021-06-05 21:30:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:36,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358481312] [2021-06-05 21:30:36,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358481312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497083190] [2021-06-05 21:30:36,971 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 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 21:30:36,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:36,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:37,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497083190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:37,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:37,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:37,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193377410] [2021-06-05 21:30:37,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:37,027 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:37,226 INFO L93 Difference]: Finished difference Result 855 states and 2351 transitions. [2021-06-05 21:30:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:37,228 INFO L225 Difference]: With dead ends: 855 [2021-06-05 21:30:37,228 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 21:30:37,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:30:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 21:30:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-06-05 21:30:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-06-05 21:30:37,237 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-06-05 21:30:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:37,237 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-06-05 21:30:37,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-06-05 21:30:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:37,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:37,238 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:37,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10277 [2021-06-05 21:30:37,439 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-06-05 21:30:37,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:37,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653567027] [2021-06-05 21:30:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:37,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:37,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653567027] [2021-06-05 21:30:37,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653567027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:37,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186664406] [2021-06-05 21:30:37,487 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 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 21:30:37,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:37,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:37,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:37,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:37,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186664406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:37,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:37,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:37,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968670013] [2021-06-05 21:30:37,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:37,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:37,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:37,542 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:37,594 INFO L93 Difference]: Finished difference Result 817 states and 2337 transitions. [2021-06-05 21:30:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:30:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:37,596 INFO L225 Difference]: With dead ends: 817 [2021-06-05 21:30:37,596 INFO L226 Difference]: Without dead ends: 817 [2021-06-05 21:30:37,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-05 21:30:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-06-05 21:30:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-06-05 21:30:37,604 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-06-05 21:30:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:37,604 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-06-05 21:30:37,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-06-05 21:30:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:37,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:37,604 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:37,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10278 [2021-06-05 21:30:37,820 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-06-05 21:30:37,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:37,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206237743] [2021-06-05 21:30:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:37,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:37,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206237743] [2021-06-05 21:30:37,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206237743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:37,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813247257] [2021-06-05 21:30:37,853 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 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 21:30:37,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:37,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:37,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813247257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:37,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:37,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:37,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21629068] [2021-06-05 21:30:37,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:37,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:37,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:37,903 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:38,013 INFO L93 Difference]: Finished difference Result 820 states and 2329 transitions. [2021-06-05 21:30:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:38,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:38,014 INFO L225 Difference]: With dead ends: 820 [2021-06-05 21:30:38,014 INFO L226 Difference]: Without dead ends: 818 [2021-06-05 21:30:38,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-06-05 21:30:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-06-05 21:30:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-06-05 21:30:38,021 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-06-05 21:30:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:38,021 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-06-05 21:30:38,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-06-05 21:30:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:38,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:38,022 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:38,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10279,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:38,222 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-06-05 21:30:38,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:38,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564102991] [2021-06-05 21:30:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:38,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:38,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564102991] [2021-06-05 21:30:38,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564102991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:38,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179865283] [2021-06-05 21:30:38,261 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 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 21:30:38,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:30:38,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:38,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:38,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179865283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:38,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:38,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:38,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814463841] [2021-06-05 21:30:38,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:38,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:38,310 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:38,411 INFO L93 Difference]: Finished difference Result 822 states and 2381 transitions. [2021-06-05 21:30:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:38,412 INFO L225 Difference]: With dead ends: 822 [2021-06-05 21:30:38,412 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 21:30:38,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 21:30:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-06-05 21:30:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-06-05 21:30:38,419 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-06-05 21:30:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:38,419 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-06-05 21:30:38,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-06-05 21:30:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:38,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:38,420 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:38,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10280,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:38,621 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-06-05 21:30:38,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:38,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723709727] [2021-06-05 21:30:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:38,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723709727] [2021-06-05 21:30:38,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723709727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:38,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121484302] [2021-06-05 21:30:38,657 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 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 21:30:38,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:38,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:38,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121484302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:38,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:38,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:38,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36848043] [2021-06-05 21:30:38,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:38,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:38,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:38,709 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:38,782 INFO L93 Difference]: Finished difference Result 797 states and 2254 transitions. [2021-06-05 21:30:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:30:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:38,784 INFO L225 Difference]: With dead ends: 797 [2021-06-05 21:30:38,784 INFO L226 Difference]: Without dead ends: 797 [2021-06-05 21:30:38,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:30:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-06-05 21:30:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-06-05 21:30:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-06-05 21:30:38,790 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-06-05 21:30:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:38,790 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-06-05 21:30:38,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-06-05 21:30:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:38,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:38,791 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:38,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10281,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:38,992 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:38,992 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-06-05 21:30:38,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:38,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023482195] [2021-06-05 21:30:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:39,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:39,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023482195] [2021-06-05 21:30:39,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023482195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480262544] [2021-06-05 21:30:39,044 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 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 21:30:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:39,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:39,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480262544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:39,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:39,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005121751] [2021-06-05 21:30:39,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:39,092 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:39,198 INFO L93 Difference]: Finished difference Result 795 states and 2316 transitions. [2021-06-05 21:30:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:39,199 INFO L225 Difference]: With dead ends: 795 [2021-06-05 21:30:39,199 INFO L226 Difference]: Without dead ends: 791 [2021-06-05 21:30:39,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-06-05 21:30:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-06-05 21:30:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-06-05 21:30:39,206 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-06-05 21:30:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:39,206 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-06-05 21:30:39,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-06-05 21:30:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:39,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:39,207 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:39,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10282,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:39,407 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:39,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-06-05 21:30:39,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:39,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526192876] [2021-06-05 21:30:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:39,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:39,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526192876] [2021-06-05 21:30:39,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526192876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028152262] [2021-06-05 21:30:39,446 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 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 21:30:39,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:39,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:39,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:39,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:39,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028152262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:39,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:30:39,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115371769] [2021-06-05 21:30:39,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:30:39,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:30:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:30:39,502 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:39,566 INFO L93 Difference]: Finished difference Result 759 states and 2167 transitions. [2021-06-05 21:30:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:30:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:39,567 INFO L225 Difference]: With dead ends: 759 [2021-06-05 21:30:39,567 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 21:30:39,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 21:30:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-06-05 21:30:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-06-05 21:30:39,573 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-06-05 21:30:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:39,573 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-06-05 21:30:39,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-06-05 21:30:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:39,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:39,574 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:39,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10283,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:39,774 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-06-05 21:30:39,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:39,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956147391] [2021-06-05 21:30:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:39,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:39,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956147391] [2021-06-05 21:30:39,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956147391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946046326] [2021-06-05 21:30:39,823 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 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 21:30:39,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:30:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:39,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:39,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946046326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:39,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:39,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880035926] [2021-06-05 21:30:39,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:39,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:39,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:39,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:39,872 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:39,978 INFO L93 Difference]: Finished difference Result 713 states and 2090 transitions. [2021-06-05 21:30:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:39,979 INFO L225 Difference]: With dead ends: 713 [2021-06-05 21:30:39,979 INFO L226 Difference]: Without dead ends: 705 [2021-06-05 21:30:39,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-05 21:30:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-06-05 21:30:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-06-05 21:30:39,985 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-06-05 21:30:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:39,985 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-06-05 21:30:39,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-06-05 21:30:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:39,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:39,986 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:40,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10284 [2021-06-05 21:30:40,187 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:40,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-06-05 21:30:40,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:40,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098021175] [2021-06-05 21:30:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:40,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:40,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098021175] [2021-06-05 21:30:40,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098021175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:40,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085119401] [2021-06-05 21:30:40,230 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 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 21:30:40,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:40,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:40,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:40,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085119401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:40,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:40,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:40,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954180553] [2021-06-05 21:30:40,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:40,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:40,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:40,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:40,285 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:40,382 INFO L93 Difference]: Finished difference Result 748 states and 2153 transitions. [2021-06-05 21:30:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:30:40,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:40,390 INFO L225 Difference]: With dead ends: 748 [2021-06-05 21:30:40,390 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 21:30:40,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 21:30:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-06-05 21:30:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-06-05 21:30:40,396 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-06-05 21:30:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:40,396 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-06-05 21:30:40,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-06-05 21:30:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:40,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:40,397 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:40,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10285,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:40,597 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-06-05 21:30:40,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:40,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393776459] [2021-06-05 21:30:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:40,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393776459] [2021-06-05 21:30:40,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393776459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323190961] [2021-06-05 21:30:40,641 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 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 21:30:40,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:30:40,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:40,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323190961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:40,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:40,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:40,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213764810] [2021-06-05 21:30:40,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:40,696 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:40,815 INFO L93 Difference]: Finished difference Result 772 states and 2234 transitions. [2021-06-05 21:30:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:40,816 INFO L225 Difference]: With dead ends: 772 [2021-06-05 21:30:40,816 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 21:30:40,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 21:30:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-06-05 21:30:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-06-05 21:30:40,823 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-06-05 21:30:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:40,823 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-06-05 21:30:40,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-06-05 21:30:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:40,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:40,824 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:41,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10286 [2021-06-05 21:30:41,037 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-06-05 21:30:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:41,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563555777] [2021-06-05 21:30:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:41,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:41,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563555777] [2021-06-05 21:30:41,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563555777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:41,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082724783] [2021-06-05 21:30:41,080 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 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 21:30:41,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:30:41,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:41,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:41,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082724783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:41,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:41,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:41,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247282655] [2021-06-05 21:30:41,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:41,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:41,139 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:41,289 INFO L93 Difference]: Finished difference Result 764 states and 2153 transitions. [2021-06-05 21:30:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:41,290 INFO L225 Difference]: With dead ends: 764 [2021-06-05 21:30:41,290 INFO L226 Difference]: Without dead ends: 764 [2021-06-05 21:30:41,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-06-05 21:30:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-06-05 21:30:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-06-05 21:30:41,296 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-06-05 21:30:41,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:41,296 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-06-05 21:30:41,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-06-05 21:30:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:41,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:41,297 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:41,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10287 [2021-06-05 21:30:41,513 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-06-05 21:30:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:41,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761432202] [2021-06-05 21:30:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:41,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:41,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761432202] [2021-06-05 21:30:41,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761432202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:41,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71607144] [2021-06-05 21:30:41,559 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 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 21:30:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:41,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71607144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:41,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:41,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:41,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624487455] [2021-06-05 21:30:41,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:41,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:41,612 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:41,677 INFO L93 Difference]: Finished difference Result 677 states and 2039 transitions. [2021-06-05 21:30:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:30:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:41,678 INFO L225 Difference]: With dead ends: 677 [2021-06-05 21:30:41,678 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 21:30:41,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 21:30:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-06-05 21:30:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-06-05 21:30:41,684 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-06-05 21:30:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:41,684 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-06-05 21:30:41,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-06-05 21:30:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:41,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:41,685 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:41,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10288 [2021-06-05 21:30:41,900 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-06-05 21:30:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:41,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755526358] [2021-06-05 21:30:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:41,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:41,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755526358] [2021-06-05 21:30:41,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755526358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:41,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275444018] [2021-06-05 21:30:41,941 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 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 21:30:41,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:41,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:41,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:42,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275444018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:42,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:42,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:42,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858015156] [2021-06-05 21:30:42,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:42,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:42,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:42,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:42,018 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:42,182 INFO L93 Difference]: Finished difference Result 742 states and 2108 transitions. [2021-06-05 21:30:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:42,183 INFO L225 Difference]: With dead ends: 742 [2021-06-05 21:30:42,183 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 21:30:42,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:30:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 21:30:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-06-05 21:30:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-06-05 21:30:42,189 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-06-05 21:30:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:42,189 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-06-05 21:30:42,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-06-05 21:30:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:42,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:42,190 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:42,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10289 [2021-06-05 21:30:42,390 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-06-05 21:30:42,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:42,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895843527] [2021-06-05 21:30:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:42,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:42,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895843527] [2021-06-05 21:30:42,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895843527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:42,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482495249] [2021-06-05 21:30:42,442 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 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 21:30:42,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:42,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:42,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:42,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482495249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:42,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:42,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:42,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854110177] [2021-06-05 21:30:42,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:42,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:42,500 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:42,558 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-06-05 21:30:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:42,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:42,559 INFO L225 Difference]: With dead ends: 671 [2021-06-05 21:30:42,559 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 21:30:42,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 21:30:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-06-05 21:30:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 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 21:30:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-06-05 21:30:42,564 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-06-05 21:30:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:42,564 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-06-05 21:30:42,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-06-05 21:30:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:42,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:42,565 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:42,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10290,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:42,766 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-06-05 21:30:42,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:42,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586959387] [2021-06-05 21:30:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:42,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:42,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586959387] [2021-06-05 21:30:42,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586959387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:42,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053141656] [2021-06-05 21:30:42,814 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 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 21:30:42,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:42,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:42,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:42,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053141656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:42,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:42,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:42,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142184804] [2021-06-05 21:30:42,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:42,871 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:43,047 INFO L93 Difference]: Finished difference Result 828 states and 2326 transitions. [2021-06-05 21:30:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:43,048 INFO L225 Difference]: With dead ends: 828 [2021-06-05 21:30:43,049 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 21:30:43,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:30:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 21:30:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-06-05 21:30:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-06-05 21:30:43,054 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-06-05 21:30:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:43,055 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-06-05 21:30:43,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-06-05 21:30:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:43,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:43,055 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:43,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10291,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:43,256 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-06-05 21:30:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:43,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807110405] [2021-06-05 21:30:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:43,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:43,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807110405] [2021-06-05 21:30:43,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807110405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:43,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419538741] [2021-06-05 21:30:43,314 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 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 21:30:43,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:30:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:43,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419538741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:43,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:43,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:43,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081835101] [2021-06-05 21:30:43,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:43,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:43,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:43,379 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:43,445 INFO L93 Difference]: Finished difference Result 869 states and 2474 transitions. [2021-06-05 21:30:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:30:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:43,446 INFO L225 Difference]: With dead ends: 869 [2021-06-05 21:30:43,446 INFO L226 Difference]: Without dead ends: 869 [2021-06-05 21:30:43,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-06-05 21:30:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-06-05 21:30:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-06-05 21:30:43,453 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-06-05 21:30:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:43,453 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-06-05 21:30:43,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-06-05 21:30:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:43,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:43,454 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:43,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10292 [2021-06-05 21:30:43,655 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:43,655 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-06-05 21:30:43,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:43,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198294604] [2021-06-05 21:30:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:43,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:43,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198294604] [2021-06-05 21:30:43,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198294604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:43,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768782623] [2021-06-05 21:30:43,763 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 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 21:30:43,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:43,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:43,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:43,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768782623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:43,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:43,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:43,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821232282] [2021-06-05 21:30:43,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:43,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:43,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:43,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:43,810 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:43,949 INFO L93 Difference]: Finished difference Result 878 states and 2501 transitions. [2021-06-05 21:30:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:43,950 INFO L225 Difference]: With dead ends: 878 [2021-06-05 21:30:43,950 INFO L226 Difference]: Without dead ends: 876 [2021-06-05 21:30:43,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-06-05 21:30:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-06-05 21:30:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-06-05 21:30:43,958 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-06-05 21:30:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:43,958 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-06-05 21:30:43,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-06-05 21:30:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:43,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:43,958 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:44,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10293,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:44,159 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-06-05 21:30:44,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:44,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965846196] [2021-06-05 21:30:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:44,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:44,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965846196] [2021-06-05 21:30:44,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965846196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:44,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862701660] [2021-06-05 21:30:44,344 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 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 21:30:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:44,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862701660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:44,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:44,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515941252] [2021-06-05 21:30:44,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:44,391 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:44,506 INFO L93 Difference]: Finished difference Result 876 states and 2523 transitions. [2021-06-05 21:30:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:44,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:44,507 INFO L225 Difference]: With dead ends: 876 [2021-06-05 21:30:44,507 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 21:30:44,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 21:30:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-06-05 21:30:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-06-05 21:30:44,515 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-06-05 21:30:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:44,515 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-06-05 21:30:44,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-06-05 21:30:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:44,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:44,516 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:44,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10294,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:44,716 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:44,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-06-05 21:30:44,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:44,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500264864] [2021-06-05 21:30:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:44,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:44,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500264864] [2021-06-05 21:30:44,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500264864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:44,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130142042] [2021-06-05 21:30:44,769 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 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 21:30:44,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:44,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:44,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:44,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:44,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130142042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:44,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:44,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:44,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623585388] [2021-06-05 21:30:44,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:44,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:44,821 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:44,892 INFO L93 Difference]: Finished difference Result 868 states and 2462 transitions. [2021-06-05 21:30:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:30:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:44,893 INFO L225 Difference]: With dead ends: 868 [2021-06-05 21:30:44,893 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 21:30:44,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 21:30:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-06-05 21:30:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-06-05 21:30:44,901 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-06-05 21:30:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:44,901 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-06-05 21:30:44,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-06-05 21:30:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:44,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:44,902 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:45,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10295,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:45,102 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-06-05 21:30:45,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:45,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894055705] [2021-06-05 21:30:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:45,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:45,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894055705] [2021-06-05 21:30:45,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894055705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779246294] [2021-06-05 21:30:45,144 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 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 21:30:45,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:45,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:45,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779246294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:45,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456178042] [2021-06-05 21:30:45,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:45,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:45,193 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:45,302 INFO L93 Difference]: Finished difference Result 905 states and 2624 transitions. [2021-06-05 21:30:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:45,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:45,304 INFO L225 Difference]: With dead ends: 905 [2021-06-05 21:30:45,304 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 21:30:45,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 21:30:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-06-05 21:30:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-06-05 21:30:45,312 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-06-05 21:30:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:45,312 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-06-05 21:30:45,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-06-05 21:30:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:45,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:45,313 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:45,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10296 [2021-06-05 21:30:45,513 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-06-05 21:30:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:45,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593169974] [2021-06-05 21:30:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:45,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:45,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593169974] [2021-06-05 21:30:45,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593169974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796470437] [2021-06-05 21:30:45,561 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 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 21:30:45,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:45,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:45,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:45,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796470437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:45,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:45,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787123344] [2021-06-05 21:30:45,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:45,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:45,629 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:45,721 INFO L93 Difference]: Finished difference Result 858 states and 2461 transitions. [2021-06-05 21:30:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:30:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:45,722 INFO L225 Difference]: With dead ends: 858 [2021-06-05 21:30:45,722 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 21:30:45,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 21:30:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-06-05 21:30:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-06-05 21:30:45,729 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-06-05 21:30:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:45,730 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-06-05 21:30:45,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-06-05 21:30:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:45,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:45,730 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:45,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10297 [2021-06-05 21:30:45,946 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:45,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-06-05 21:30:45,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:45,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508071069] [2021-06-05 21:30:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:45,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508071069] [2021-06-05 21:30:45,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508071069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622585154] [2021-06-05 21:30:45,986 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 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 21:30:46,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:30:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:46,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622585154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:46,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:46,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:46,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010195028] [2021-06-05 21:30:46,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:46,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:46,039 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:46,167 INFO L93 Difference]: Finished difference Result 936 states and 2753 transitions. [2021-06-05 21:30:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:46,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:46,168 INFO L225 Difference]: With dead ends: 936 [2021-06-05 21:30:46,168 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 21:30:46,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 21:30:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-06-05 21:30:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-06-05 21:30:46,176 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-06-05 21:30:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:46,176 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-06-05 21:30:46,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-06-05 21:30:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:46,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:46,177 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:46,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10298,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:46,393 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-06-05 21:30:46,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:46,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096774070] [2021-06-05 21:30:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:46,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:46,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096774070] [2021-06-05 21:30:46,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096774070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:46,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66621863] [2021-06-05 21:30:46,443 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 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 21:30:46,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:46,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:46,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66621863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:46,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:46,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:46,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999442598] [2021-06-05 21:30:46,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:46,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:46,497 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:46,577 INFO L93 Difference]: Finished difference Result 835 states and 2456 transitions. [2021-06-05 21:30:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:30:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:46,578 INFO L225 Difference]: With dead ends: 835 [2021-06-05 21:30:46,579 INFO L226 Difference]: Without dead ends: 835 [2021-06-05 21:30:46,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-06-05 21:30:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-06-05 21:30:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-06-05 21:30:46,586 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-06-05 21:30:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:46,586 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-06-05 21:30:46,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-06-05 21:30:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:46,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:46,586 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:46,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10299 [2021-06-05 21:30:46,788 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-06-05 21:30:46,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:46,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227992042] [2021-06-05 21:30:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:46,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:46,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227992042] [2021-06-05 21:30:46,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227992042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:46,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749909312] [2021-06-05 21:30:46,837 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 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 21:30:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:46,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749909312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:46,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:46,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:46,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042528012] [2021-06-05 21:30:46,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:46,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:46,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:46,884 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:46,985 INFO L93 Difference]: Finished difference Result 914 states and 2697 transitions. [2021-06-05 21:30:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:46,987 INFO L225 Difference]: With dead ends: 914 [2021-06-05 21:30:46,987 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 21:30:46,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 21:30:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-06-05 21:30:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-06-05 21:30:46,994 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-06-05 21:30:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:46,994 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-06-05 21:30:46,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-06-05 21:30:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:46,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:46,995 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:47,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10300 [2021-06-05 21:30:47,195 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-06-05 21:30:47,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:47,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597627289] [2021-06-05 21:30:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:47,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:47,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597627289] [2021-06-05 21:30:47,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597627289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306051515] [2021-06-05 21:30:47,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:30:47,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:47,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:47,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306051515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:47,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:30:47,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230202766] [2021-06-05 21:30:47,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:30:47,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:30:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:30:47,306 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:47,375 INFO L93 Difference]: Finished difference Result 812 states and 2469 transitions. [2021-06-05 21:30:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:30:47,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:47,376 INFO L225 Difference]: With dead ends: 812 [2021-06-05 21:30:47,376 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 21:30:47,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 21:30:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-06-05 21:30:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-06-05 21:30:47,383 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-06-05 21:30:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:47,383 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-06-05 21:30:47,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-06-05 21:30:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:47,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:47,384 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:47,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10301 [2021-06-05 21:30:47,585 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:47,585 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-06-05 21:30:47,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:47,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058900556] [2021-06-05 21:30:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:47,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058900556] [2021-06-05 21:30:47,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058900556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917742868] [2021-06-05 21:30:47,625 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 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 21:30:47,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:30:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:47,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917742868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:47,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:47,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477536900] [2021-06-05 21:30:47,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:47,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:47,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:47,680 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:47,798 INFO L93 Difference]: Finished difference Result 930 states and 2762 transitions. [2021-06-05 21:30:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:47,799 INFO L225 Difference]: With dead ends: 930 [2021-06-05 21:30:47,799 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 21:30:47,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 21:30:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-06-05 21:30:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-06-05 21:30:47,807 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-06-05 21:30:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:47,808 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-06-05 21:30:47,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-06-05 21:30:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:47,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:47,808 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:48,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10302,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:48,009 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:48,009 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-06-05 21:30:48,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:48,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323909188] [2021-06-05 21:30:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:48,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323909188] [2021-06-05 21:30:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323909188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548265221] [2021-06-05 21:30:48,059 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 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 21:30:48,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:48,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:48,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548265221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:48,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:48,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610578103] [2021-06-05 21:30:48,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:48,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:48,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:48,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:48,117 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:48,237 INFO L93 Difference]: Finished difference Result 870 states and 2608 transitions. [2021-06-05 21:30:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:30:48,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:48,238 INFO L225 Difference]: With dead ends: 870 [2021-06-05 21:30:48,238 INFO L226 Difference]: Without dead ends: 870 [2021-06-05 21:30:48,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:30:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-06-05 21:30:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-06-05 21:30:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-06-05 21:30:48,246 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-06-05 21:30:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:48,246 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-06-05 21:30:48,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-06-05 21:30:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:48,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:48,247 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:48,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10303 [2021-06-05 21:30:48,447 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-06-05 21:30:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:48,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803006945] [2021-06-05 21:30:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:48,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803006945] [2021-06-05 21:30:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803006945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107526222] [2021-06-05 21:30:48,488 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 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 21:30:48,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:30:48,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:48,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107526222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:48,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:48,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933932105] [2021-06-05 21:30:48,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:48,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:48,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:48,551 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:48,613 INFO L93 Difference]: Finished difference Result 853 states and 2620 transitions. [2021-06-05 21:30:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:48,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:48,614 INFO L225 Difference]: With dead ends: 853 [2021-06-05 21:30:48,614 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 21:30:48,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 21:30:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-06-05 21:30:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-06-05 21:30:48,621 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-06-05 21:30:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:48,621 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-06-05 21:30:48,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-06-05 21:30:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:48,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:48,622 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:48,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10304,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:48,823 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:48,823 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-06-05 21:30:48,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:48,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789205051] [2021-06-05 21:30:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:48,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789205051] [2021-06-05 21:30:48,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789205051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252229389] [2021-06-05 21:30:48,871 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 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 21:30:48,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:48,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252229389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478441354] [2021-06-05 21:30:48,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:48,935 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:49,070 INFO L93 Difference]: Finished difference Result 875 states and 2625 transitions. [2021-06-05 21:30:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:49,071 INFO L225 Difference]: With dead ends: 875 [2021-06-05 21:30:49,071 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 21:30:49,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 21:30:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-06-05 21:30:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-06-05 21:30:49,079 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-06-05 21:30:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:49,079 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-06-05 21:30:49,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-06-05 21:30:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:49,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:49,080 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:49,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10305,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:49,280 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:49,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-06-05 21:30:49,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:49,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878566965] [2021-06-05 21:30:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:49,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:49,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878566965] [2021-06-05 21:30:49,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878566965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:49,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131875991] [2021-06-05 21:30:49,325 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 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 21:30:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:49,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131875991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:49,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:49,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:49,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387398589] [2021-06-05 21:30:49,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:49,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:49,377 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:49,440 INFO L93 Difference]: Finished difference Result 848 states and 2607 transitions. [2021-06-05 21:30:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:30:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:49,442 INFO L225 Difference]: With dead ends: 848 [2021-06-05 21:30:49,442 INFO L226 Difference]: Without dead ends: 834 [2021-06-05 21:30:49,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-05 21:30:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-06-05 21:30:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-06-05 21:30:49,449 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-06-05 21:30:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:49,449 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-06-05 21:30:49,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-06-05 21:30:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:49,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:49,450 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:49,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10306 [2021-06-05 21:30:49,650 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-06-05 21:30:49,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:49,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097193588] [2021-06-05 21:30:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:49,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097193588] [2021-06-05 21:30:49,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097193588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922411177] [2021-06-05 21:30:49,704 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 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 21:30:49,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:49,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:49,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922411177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:49,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:49,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:49,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750445713] [2021-06-05 21:30:49,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:49,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:49,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:49,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:49,770 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:49,910 INFO L93 Difference]: Finished difference Result 921 states and 2738 transitions. [2021-06-05 21:30:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:49,912 INFO L225 Difference]: With dead ends: 921 [2021-06-05 21:30:49,912 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 21:30:49,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 21:30:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-06-05 21:30:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-06-05 21:30:49,920 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-06-05 21:30:49,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:49,920 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-06-05 21:30:49,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,920 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-06-05 21:30:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:49,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:49,921 INFO L554 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:50,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10307,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:50,122 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:50,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:50,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-06-05 21:30:50,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:50,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071133618] [2021-06-05 21:30:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:50,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:50,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071133618] [2021-06-05 21:30:50,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071133618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:50,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875323748] [2021-06-05 21:30:50,171 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 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 21:30:50,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:30:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:50,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875323748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:50,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:50,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681779778] [2021-06-05 21:30:50,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:50,227 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:50,277 INFO L93 Difference]: Finished difference Result 846 states and 2603 transitions. [2021-06-05 21:30:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:50,278 INFO L225 Difference]: With dead ends: 846 [2021-06-05 21:30:50,278 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 21:30:50,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 21:30:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-06-05 21:30:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-06-05 21:30:50,286 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-06-05 21:30:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:50,286 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-06-05 21:30:50,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-06-05 21:30:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:30:50,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:50,287 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:50,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10308 [2021-06-05 21:30:50,492 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-06-05 21:30:50,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:50,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53701340] [2021-06-05 21:30:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:50,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53701340] [2021-06-05 21:30:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53701340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821025662] [2021-06-05 21:30:50,558 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 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 21:30:50,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:50,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:50,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:30:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:50,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821025662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:50,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:50,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:30:50,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744100839] [2021-06-05 21:30:50,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:30:50,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:50,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:30:50,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:30:50,615 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:50,751 INFO L93 Difference]: Finished difference Result 1025 states and 3016 transitions. [2021-06-05 21:30:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:50,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:30:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:50,753 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 21:30:50,753 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 21:30:50,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 21:30:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-06-05 21:30:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-06-05 21:30:50,761 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-06-05 21:30:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:50,761 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-06-05 21:30:50,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-06-05 21:30:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:30:50,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:50,762 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:50,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10309,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:50,977 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-06-05 21:30:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:50,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311405297] [2021-06-05 21:30:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:51,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:51,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311405297] [2021-06-05 21:30:51,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311405297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:51,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603390666] [2021-06-05 21:30:51,088 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 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 21:30:51,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:30:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:51,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:30:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:51,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:51,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:30:52,090 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 262 [2021-06-05 21:30:53,187 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 332 [2021-06-05 21:30:53,406 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 394 [2021-06-05 21:30:53,697 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-06-05 21:30:53,986 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-06-05 21:30:54,297 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 389 [2021-06-05 21:30:54,548 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 359 [2021-06-05 21:30:54,688 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 251 [2021-06-05 21:30:55,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:55,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:55,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:55,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:30:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:55,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603390666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:55,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:55,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 21:30:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122071958] [2021-06-05 21:30:55,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 21:30:55,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 21:30:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:30:55,307 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 21:30:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:55,669 INFO L93 Difference]: Finished difference Result 853 states and 2629 transitions. [2021-06-05 21:30:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:30:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20 [2021-06-05 21:30:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:55,670 INFO L225 Difference]: With dead ends: 853 [2021-06-05 21:30:55,670 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 21:30:55,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:30:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 21:30:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-06-05 21:30:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-06-05 21:30:55,678 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-06-05 21:30:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:55,678 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-06-05 21:30:55,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 21:30:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-06-05 21:30:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:30:55,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:55,679 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:55,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10310 [2021-06-05 21:30:55,880 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:55,880 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-06-05 21:30:55,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:55,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114451963] [2021-06-05 21:30:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:55,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:55,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114451963] [2021-06-05 21:30:55,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114451963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:55,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103078363] [2021-06-05 21:30:55,977 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 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 21:30:56,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:30:56,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:56,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:30:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:56,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:56,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:30:57,083 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 353 [2021-06-05 21:30:57,474 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 237 [2021-06-05 21:30:57,788 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 264 [2021-06-05 21:30:58,522 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-06-05 21:30:58,721 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-06-05 21:30:58,939 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 356 [2021-06-05 21:30:59,144 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-06-05 21:30:59,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:30:59,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:30:59,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:30:59,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:30:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:59,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103078363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:59,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:59,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:30:59,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139154625] [2021-06-05 21:30:59,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:30:59,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:59,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:30:59,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:59,942 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:31:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:00,341 INFO L93 Difference]: Finished difference Result 877 states and 2701 transitions. [2021-06-05 21:31:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:31:00,341 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:31:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:00,342 INFO L225 Difference]: With dead ends: 877 [2021-06-05 21:31:00,342 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 21:31:00,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:31:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 21:31:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-06-05 21:31:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 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 21:31:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-06-05 21:31:00,351 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-06-05 21:31:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:00,351 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-06-05 21:31:00,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:31:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-06-05 21:31:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:31:00,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:00,352 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:00,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10608,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:00,552 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-06-05 21:31:00,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:00,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757784014] [2021-06-05 21:31:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:00,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757784014] [2021-06-05 21:31:00,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757784014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954288545] [2021-06-05 21:31:00,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:31:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:00,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:31:00,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:01,345 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-06-05 21:31:01,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:31:01,930 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 188 [2021-06-05 21:31:02,604 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 237 [2021-06-05 21:31:02,787 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-06-05 21:31:02,985 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-06-05 21:31:03,238 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 313 [2021-06-05 21:31:03,393 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 274 [2021-06-05 21:31:04,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:04,529 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:31:04,529 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:31:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:31:05,571 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 241 [2021-06-05 21:31:05,731 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 264 [2021-06-05 21:31:06,461 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-06-05 21:31:06,772 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-06-05 21:31:07,135 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 364 [2021-06-05 21:31:07,310 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 245 [2021-06-05 21:31:07,450 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 248 [2021-06-05 21:31:08,175 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 214 [2021-06-05 21:31:08,298 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 225 [2021-06-05 21:31:08,450 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 21:31:08,605 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 21:31:08,777 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 240 [2021-06-05 21:31:08,948 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 248 [2021-06-05 21:31:09,810 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 176 [2021-06-05 21:31:10,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:31:10,706 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:31:10,706 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:31:10,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:31:11,304 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 263 [2021-06-05 21:31:12,340 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 267 [2021-06-05 21:31:12,509 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 283 [2021-06-05 21:31:12,676 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 296 [2021-06-05 21:31:13,860 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 314 [2021-06-05 21:31:14,061 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 339 [2021-06-05 21:31:14,468 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 513 [2021-06-05 21:31:14,974 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-06-05 21:31:15,477 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-06-05 21:31:16,091 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 543 [2021-06-05 21:31:16,535 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 456 [2021-06-05 21:31:16,939 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 292 [2021-06-05 21:31:17,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:31:17,884 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:31:17,885 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:31:17,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:31:19,688 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-06-05 21:31:19,843 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-06-05 21:31:20,035 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 253 [2021-06-05 21:31:20,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:31:20,834 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:31:20,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:31:20,835 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:31:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:20,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954288545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:20,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:20,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:31:20,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313412285] [2021-06-05 21:31:20,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:31:20,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:31:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:31:20,863 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:31:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:21,191 INFO L93 Difference]: Finished difference Result 901 states and 2754 transitions. [2021-06-05 21:31:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:31:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:31:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:21,193 INFO L225 Difference]: With dead ends: 901 [2021-06-05 21:31:21,193 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 21:31:21,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:31:21,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 21:31:21,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-06-05 21:31:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 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 21:31:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-06-05 21:31:21,202 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-06-05 21:31:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:21,202 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-06-05 21:31:21,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:31:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-06-05 21:31:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:31:21,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:21,203 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:21,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11011,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:21,403 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-06-05 21:31:21,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:21,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901435691] [2021-06-05 21:31:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:21,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901435691] [2021-06-05 21:31:21,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901435691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331692143] [2021-06-05 21:31:21,500 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 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 21:31:21,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:31:21,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:21,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:31:21,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:21,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:31:23,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:23,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:23,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:31:23,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:31:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:23,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331692143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:23,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:23,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:31:23,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973192051] [2021-06-05 21:31:23,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:31:23,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:31:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:31:23,292 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:31:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:23,694 INFO L93 Difference]: Finished difference Result 938 states and 2953 transitions. [2021-06-05 21:31:23,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:31:23,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:31:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:23,696 INFO L225 Difference]: With dead ends: 938 [2021-06-05 21:31:23,696 INFO L226 Difference]: Without dead ends: 922 [2021-06-05 21:31:23,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:31:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-06-05 21:31:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-06-05 21:31:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-06-05 21:31:23,705 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-06-05 21:31:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:23,705 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-06-05 21:31:23,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:31:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-06-05 21:31:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:31:23,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:23,706 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:23,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12560,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:23,906 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-06-05 21:31:23,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:23,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191750468] [2021-06-05 21:31:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:24,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:24,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191750468] [2021-06-05 21:31:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191750468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560793015] [2021-06-05 21:31:24,004 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 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 21:31:24,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:31:24,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:24,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:31:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:24,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:31:24,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:31:24,982 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 251 [2021-06-05 21:31:25,084 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 251 [2021-06-05 21:31:25,205 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 262 [2021-06-05 21:31:25,506 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 358 [2021-06-05 21:31:25,740 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 318 [2021-06-05 21:31:26,022 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 183 [2021-06-05 21:31:26,915 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 202 [2021-06-05 21:31:27,019 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 213 [2021-06-05 21:31:27,177 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 158 [2021-06-05 21:31:27,777 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-06-05 21:31:27,998 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-06-05 21:31:28,249 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 268 [2021-06-05 21:31:28,379 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 231 [2021-06-05 21:31:28,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:31:29,350 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:31:29,351 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:31:29,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:31:30,976 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 212 [2021-06-05 21:31:31,193 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 224 [2021-06-05 21:31:31,452 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 239 [2021-06-05 21:31:32,250 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 168 [2021-06-05 21:31:32,393 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 221 [2021-06-05 21:31:32,569 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 231 [2021-06-05 21:31:32,819 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 252 [2021-06-05 21:31:33,091 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 262 [2021-06-05 21:31:33,641 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 329 [2021-06-05 21:31:34,278 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 348 [2021-06-05 21:31:35,373 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 185 [2021-06-05 21:31:35,544 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 234 [2021-06-05 21:31:35,752 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 249 [2021-06-05 21:31:36,009 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 259 [2021-06-05 21:31:36,285 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 272 [2021-06-05 21:31:37,034 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 206 [2021-06-05 21:31:37,153 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 214 [2021-06-05 21:31:37,303 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 241 [2021-06-05 21:31:37,483 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 251 [2021-06-05 21:31:37,724 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 294 [2021-06-05 21:31:38,301 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 359 [2021-06-05 21:31:39,005 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 398 [2021-06-05 21:31:39,769 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 399 [2021-06-05 21:31:41,324 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 965 DAG size of output: 559 [2021-06-05 21:31:43,124 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-06-05 21:31:44,928 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-06-05 21:31:46,813 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 1039 DAG size of output: 578 [2021-06-05 21:31:48,122 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 580 DAG size of output: 594 [2021-06-05 21:31:49,328 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 573 DAG size of output: 578 [2021-06-05 21:31:50,700 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 567 DAG size of output: 601 [2021-06-05 21:31:52,111 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 562 DAG size of output: 494 [2021-06-05 21:31:52,231 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 443 [2021-06-05 21:31:52,439 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 409 [2021-06-05 21:31:53,365 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 210 [2021-06-05 21:31:53,488 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 216 [2021-06-05 21:31:53,640 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 235 [2021-06-05 21:31:53,811 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 265 [2021-06-05 21:31:54,043 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 299 [2021-06-05 21:31:54,442 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 359 [2021-06-05 21:31:54,920 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 376 [2021-06-05 21:31:55,511 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-06-05 21:31:56,105 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-06-05 21:31:56,792 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 426 [2021-06-05 21:31:57,829 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 428 DAG size of output: 651 [2021-06-05 21:31:58,502 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 343 [2021-06-05 21:31:59,290 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 351 [2021-06-05 21:32:00,268 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 272 [2021-06-05 21:32:00,452 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 286 [2021-06-05 21:32:00,747 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 392 [2021-06-05 21:32:01,377 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 453 [2021-06-05 21:32:02,067 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 323 [2021-06-05 21:32:02,997 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 259 [2021-06-05 21:32:03,157 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 270 [2021-06-05 21:32:03,342 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 273 [2021-06-05 21:32:03,653 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 313 [2021-06-05 21:32:04,085 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 382 [2021-06-05 21:32:04,507 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 444 [2021-06-05 21:32:05,332 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-06-05 21:32:06,167 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-06-05 21:32:07,091 WARN L205 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 1028 DAG size of output: 677 [2021-06-05 21:32:07,355 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 258 [2021-06-05 21:32:07,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:32:08,285 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:32:08,285 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:32:08,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:32:09,496 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-06-05 21:32:09,681 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-06-05 21:32:09,933 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 416 [2021-06-05 21:32:10,244 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 522 [2021-06-05 21:32:10,653 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 518 [2021-06-05 21:32:10,988 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 479 [2021-06-05 21:32:11,310 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 485 [2021-06-05 21:32:11,554 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 350 [2021-06-05 21:32:12,353 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 347 [2021-06-05 21:32:12,702 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 416 [2021-06-05 21:32:12,895 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2021-06-05 21:32:13,784 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 21:32:14,292 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 576 [2021-06-05 21:32:15,079 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 969 DAG size of output: 660 [2021-06-05 21:32:15,278 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 352 [2021-06-05 21:32:15,437 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 303 [2021-06-05 21:32:15,983 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 248 [2021-06-05 21:32:16,599 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 390 [2021-06-05 21:32:16,726 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 249 [2021-06-05 21:32:16,851 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 227 [2021-06-05 21:32:17,235 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 241 [2021-06-05 21:32:17,883 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 334 [2021-06-05 21:32:18,391 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 554 [2021-06-05 21:32:19,463 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1305 DAG size of output: 734 [2021-06-05 21:32:20,831 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-06-05 21:32:22,206 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-06-05 21:32:23,869 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 1487 DAG size of output: 829 [2021-06-05 21:32:25,622 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 831 DAG size of output: 1033 [2021-06-05 21:32:27,441 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 779 DAG size of output: 893 [2021-06-05 21:32:28,196 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 555 [2021-06-05 21:32:29,053 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 258 [2021-06-05 21:32:29,276 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 326 [2021-06-05 21:32:30,073 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 239 [2021-06-05 21:32:30,389 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 408 [2021-06-05 21:32:30,541 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 573 [2021-06-05 21:32:31,233 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 526 [2021-06-05 21:32:31,358 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 219 [2021-06-05 21:32:31,849 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 251 [2021-06-05 21:32:32,295 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 314 [2021-06-05 21:32:32,410 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 207 [2021-06-05 21:32:33,097 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 411 [2021-06-05 21:32:33,446 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 448 [2021-06-05 21:32:34,146 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 720 [2021-06-05 21:32:35,111 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 619 [2021-06-05 21:32:35,665 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 481 [2021-06-05 21:32:35,838 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 242 [2021-06-05 21:32:36,491 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 246 [2021-06-05 21:32:37,079 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 261 [2021-06-05 21:32:37,314 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 295 [2021-06-05 21:32:37,687 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 359 [2021-06-05 21:32:38,696 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 264 [2021-06-05 21:32:38,860 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 269 [2021-06-05 21:32:39,243 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 449 [2021-06-05 21:32:40,404 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-06-05 21:32:41,574 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-06-05 21:32:42,916 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 1612 DAG size of output: 912 [2021-06-05 21:32:43,783 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 718 [2021-06-05 21:32:44,098 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 242 [2021-06-05 21:32:44,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:32:44,848 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:32:44,848 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:32:44,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:32:45,886 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-06-05 21:32:46,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:32:46,404 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:32:46,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:32:46,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:32:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:46,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560793015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:46,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:46,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:32:46,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718804850] [2021-06-05 21:32:46,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:32:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:32:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:32:46,433 INFO L87 Difference]: Start difference. First operand 871 states and 2816 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:32:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:46,878 INFO L93 Difference]: Finished difference Result 978 states and 3027 transitions. [2021-06-05 21:32:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:32:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:32:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:46,880 INFO L225 Difference]: With dead ends: 978 [2021-06-05 21:32:46,880 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 21:32:46,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:32:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 21:32:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 869. [2021-06-05 21:32:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.224654377880184) internal successors, (2799), 868 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2799 transitions. [2021-06-05 21:32:46,889 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2799 transitions. Word has length 20 [2021-06-05 21:32:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:46,889 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2799 transitions. [2021-06-05 21:32:46,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:32:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2799 transitions. [2021-06-05 21:32:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:32:46,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:46,890 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:47,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12777,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:47,091 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:47,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1005428375, now seen corresponding path program 202 times [2021-06-05 21:32:47,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:47,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864642797] [2021-06-05 21:32:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:47,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:47,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864642797] [2021-06-05 21:32:47,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864642797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:47,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536472515] [2021-06-05 21:32:47,188 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 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 21:32:47,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:32:47,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:47,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:32:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:47,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:32:47,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:32:48,387 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 249 [2021-06-05 21:32:48,536 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 202 [2021-06-05 21:32:48,819 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 238 [2021-06-05 21:32:49,666 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 221 [2021-06-05 21:32:49,795 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-06-05 21:32:49,924 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-06-05 21:32:50,074 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 237 [2021-06-05 21:32:50,196 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 239 [2021-06-05 21:32:50,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:32:50,972 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:32:50,973 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:32:50,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:32:51,591 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 242 [2021-06-05 21:32:51,712 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 255 [2021-06-05 21:32:51,874 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 299 [2021-06-05 21:32:52,923 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 315 [2021-06-05 21:32:53,113 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-06-05 21:32:53,311 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-06-05 21:32:53,533 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 337 [2021-06-05 21:32:53,888 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 399 [2021-06-05 21:32:54,242 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 308 [2021-06-05 21:32:54,541 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 310 [2021-06-05 21:32:55,547 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 265 [2021-06-05 21:32:57,038 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 291 [2021-06-05 21:32:57,676 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 434 [2021-06-05 21:32:58,265 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 577 [2021-06-05 21:32:58,958 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 578 [2021-06-05 21:32:59,802 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 653 [2021-06-05 21:32:59,970 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 266 [2021-06-05 21:33:00,930 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 228 [2021-06-05 21:33:01,092 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 247 [2021-06-05 21:33:02,037 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 233 [2021-06-05 21:33:02,488 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 301 [2021-06-05 21:33:03,376 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 458 [2021-06-05 21:33:03,980 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 463 [2021-06-05 21:33:04,738 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 569 [2021-06-05 21:33:06,464 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-06-05 21:33:08,195 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-06-05 21:33:09,986 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 1200 DAG size of output: 859 [2021-06-05 21:33:11,299 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 861 DAG size of output: 700 [2021-06-05 21:33:12,237 WARN L205 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 590 [2021-06-05 21:33:12,784 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 672 [2021-06-05 21:33:13,740 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 215 [2021-06-05 21:33:13,916 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-06-05 21:33:14,094 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-06-05 21:33:14,274 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 234 [2021-06-05 21:33:14,441 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 255 [2021-06-05 21:33:15,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:33:15,455 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:33:15,456 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:33:15,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:33:17,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:33:17,864 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:33:17,864 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:33:17,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:33:19,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:33:19,068 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:33:19,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:19,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:33:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:19,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536472515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:19,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:19,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:33:19,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928078381] [2021-06-05 21:33:19,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:33:19,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:19,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:33:19,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:33:19,097 INFO L87 Difference]: Start difference. First operand 869 states and 2799 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:33:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:19,537 INFO L93 Difference]: Finished difference Result 942 states and 2954 transitions. [2021-06-05 21:33:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:33:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:33:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:19,539 INFO L225 Difference]: With dead ends: 942 [2021-06-05 21:33:19,539 INFO L226 Difference]: Without dead ends: 932 [2021-06-05 21:33:19,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:33:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-05 21:33:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 872. [2021-06-05 21:33:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2238805970149254) internal successors, (2808), 871 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2808 transitions. [2021-06-05 21:33:19,548 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2808 transitions. Word has length 20 [2021-06-05 21:33:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:19,548 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2808 transitions. [2021-06-05 21:33:19,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:33:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2808 transitions. [2021-06-05 21:33:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:33:19,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:19,549 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:19,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15915 [2021-06-05 21:33:19,750 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash 990820585, now seen corresponding path program 203 times [2021-06-05 21:33:19,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:19,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372414767] [2021-06-05 21:33:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:19,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:19,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372414767] [2021-06-05 21:33:19,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372414767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:19,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055707427] [2021-06-05 21:33:19,846 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 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 21:33:19,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:33:19,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 21:33:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:20,297 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 21:33:20,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:20,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:33:20,791 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 312 [2021-06-05 21:33:21,290 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 475 [2021-06-05 21:33:21,504 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-06-05 21:33:21,720 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-06-05 21:33:21,978 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 496 [2021-06-05 21:33:22,288 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 658 [2021-06-05 21:33:22,420 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 446 [2021-06-05 21:33:23,268 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-06-05 21:33:23,421 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-06-05 21:33:23,662 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 318 [2021-06-05 21:33:24,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:24,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:24,121 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 21:33:24,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:3 [2021-06-05 21:33:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:24,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055707427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:24,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:24,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:33:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504063953] [2021-06-05 21:33:24,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:33:24,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:33:24,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:33:24,126 INFO L87 Difference]: Start difference. First operand 872 states and 2808 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:33:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:24,836 INFO L93 Difference]: Finished difference Result 1010 states and 3206 transitions. [2021-06-05 21:33:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:33:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:24,838 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 21:33:24,838 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 21:33:24,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 387.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:33:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 21:33:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 941. [2021-06-05 21:33:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.2542553191489363) internal successors, (3059), 940 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3059 transitions. [2021-06-05 21:33:24,849 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3059 transitions. Word has length 20 [2021-06-05 21:33:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:24,849 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3059 transitions. [2021-06-05 21:33:24,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:33:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3059 transitions. [2021-06-05 21:33:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:33:24,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:24,850 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:25,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18834,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:25,051 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695115, now seen corresponding path program 204 times [2021-06-05 21:33:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:25,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614144756] [2021-06-05 21:33:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:25,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614144756] [2021-06-05 21:33:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614144756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489902222] [2021-06-05 21:33:25,150 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 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 21:33:25,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:33:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:25,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:33:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:25,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:33:26,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:27,454 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:33:27,454 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:33:27,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:33:28,108 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 259 [2021-06-05 21:33:28,788 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 269 [2021-06-05 21:33:29,329 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 375 [2021-06-05 21:33:29,598 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-06-05 21:33:29,856 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-06-05 21:33:30,145 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 394 [2021-06-05 21:33:30,430 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 391 [2021-06-05 21:33:30,581 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 302 [2021-06-05 21:33:30,793 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 266 [2021-06-05 21:33:30,967 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 271 [2021-06-05 21:33:31,605 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 249 [2021-06-05 21:33:31,730 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 259 [2021-06-05 21:33:32,301 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 331 [2021-06-05 21:33:33,286 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 258 [2021-06-05 21:33:33,449 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 280 [2021-06-05 21:33:33,827 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 299 [2021-06-05 21:33:34,241 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 478 [2021-06-05 21:33:34,745 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 504 [2021-06-05 21:33:35,382 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-06-05 21:33:36,020 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-06-05 21:33:36,710 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 809 DAG size of output: 559 [2021-06-05 21:33:37,291 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 561 [2021-06-05 21:33:38,351 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 465 [2021-06-05 21:33:39,111 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 355 [2021-06-05 21:33:39,355 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 370 [2021-06-05 21:33:39,648 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-06-05 21:33:39,905 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-06-05 21:33:40,194 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-06-05 21:33:40,690 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 291 [2021-06-05 21:33:41,288 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 229 [2021-06-05 21:33:41,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:33:42,072 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:33:42,072 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:33:42,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:33:44,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:33:44,476 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:33:44,477 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:33:44,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:33:45,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:33:45,842 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:33:45,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:33:45,843 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:33:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:45,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489902222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:45,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:45,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:33:45,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836026884] [2021-06-05 21:33:45,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:33:45,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:33:45,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:33:45,871 INFO L87 Difference]: Start difference. First operand 941 states and 3059 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:33:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:46,451 INFO L93 Difference]: Finished difference Result 1081 states and 3355 transitions. [2021-06-05 21:33:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:33:46,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:33:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:46,452 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 21:33:46,453 INFO L226 Difference]: Without dead ends: 1055 [2021-06-05 21:33:46,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 451.8ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:33:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-06-05 21:33:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 947. [2021-06-05 21:33:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.251585623678647) internal successors, (3076), 946 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3076 transitions. [2021-06-05 21:33:46,463 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3076 transitions. Word has length 20 [2021-06-05 21:33:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:46,463 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3076 transitions. [2021-06-05 21:33:46,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:33:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3076 transitions. [2021-06-05 21:33:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:33:46,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:46,464 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:46,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19308,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:46,665 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:46,665 INFO L82 PathProgramCache]: Analyzing trace with hash -734658873, now seen corresponding path program 205 times [2021-06-05 21:33:46,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:46,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333709077] [2021-06-05 21:33:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:46,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:46,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333709077] [2021-06-05 21:33:46,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333709077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:46,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564216657] [2021-06-05 21:33:46,766 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 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 21:33:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:46,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:33:46,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:47,093 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 49 [2021-06-05 21:33:47,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:33:47,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:33:47,940 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 256 [2021-06-05 21:33:48,827 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-06-05 21:33:48,957 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-06-05 21:33:49,113 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 262 [2021-06-05 21:33:49,255 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 253 [2021-06-05 21:33:49,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:33:50,072 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:33:50,073 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:33:50,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:33:51,056 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 263 [2021-06-05 21:33:51,209 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 315 [2021-06-05 21:33:51,398 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-06-05 21:33:51,593 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-06-05 21:33:51,833 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 341 [2021-06-05 21:33:52,300 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 439 [2021-06-05 21:33:52,713 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 423 [2021-06-05 21:33:52,937 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 343 [2021-06-05 21:33:53,107 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 295 [2021-06-05 21:33:53,224 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 255 [2021-06-05 21:33:54,747 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 231 [2021-06-05 21:33:54,981 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 291 [2021-06-05 21:33:55,275 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 320 [2021-06-05 21:33:55,650 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 374 [2021-06-05 21:33:56,128 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 417 [2021-06-05 21:33:56,332 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 294 [2021-06-05 21:33:57,443 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 242 [2021-06-05 21:33:58,153 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 220 [2021-06-05 21:33:58,423 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 330 [2021-06-05 21:33:58,792 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 402 [2021-06-05 21:33:59,251 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 432 [2021-06-05 21:33:59,865 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 646 DAG size of output: 497 [2021-06-05 21:34:01,079 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 924 DAG size of output: 729 [2021-06-05 21:34:02,610 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1058 DAG size of output: 857 [2021-06-05 21:34:02,979 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 348 [2021-06-05 21:34:03,168 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 302 [2021-06-05 21:34:03,349 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 265 [2021-06-05 21:34:03,459 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 228 [2021-06-05 21:34:04,182 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2021-06-05 21:34:04,311 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 239 [2021-06-05 21:34:05,176 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 298 [2021-06-05 21:34:05,500 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 349 [2021-06-05 21:34:05,730 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 298 [2021-06-05 21:34:05,856 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 248 [2021-06-05 21:34:05,997 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 233 [2021-06-05 21:34:06,954 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 262 [2021-06-05 21:34:07,942 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 226 [2021-06-05 21:34:08,118 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 280 [2021-06-05 21:34:08,333 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 287 [2021-06-05 21:34:08,751 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 406 [2021-06-05 21:34:09,340 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 482 [2021-06-05 21:34:10,361 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 841 DAG size of output: 671 [2021-06-05 21:34:11,681 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 981 DAG size of output: 787 [2021-06-05 21:34:14,966 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1383 [2021-06-05 21:34:15,469 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 426 [2021-06-05 21:34:15,710 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 351 [2021-06-05 21:34:15,891 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 304 [2021-06-05 21:34:16,017 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 264 [2021-06-05 21:34:16,959 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 222 [2021-06-05 21:34:17,118 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 245 [2021-06-05 21:34:17,974 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 250 [2021-06-05 21:34:18,138 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 257 [2021-06-05 21:34:18,503 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 344 [2021-06-05 21:34:18,968 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 390 [2021-06-05 21:34:19,188 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 300 [2021-06-05 21:34:19,317 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 250 [2021-06-05 21:34:20,201 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 243 [2021-06-05 21:34:20,379 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 262 [2021-06-05 21:34:20,611 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 330 [2021-06-05 21:34:20,719 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 266 [2021-06-05 21:34:20,868 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 262 [2021-06-05 21:34:21,921 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 245 [2021-06-05 21:34:22,144 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 310 [2021-06-05 21:34:22,469 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 389 [2021-06-05 21:34:23,078 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 540 [2021-06-05 21:34:23,879 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 622 [2021-06-05 21:34:25,289 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1030 DAG size of output: 835 [2021-06-05 21:34:27,089 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 1173 DAG size of output: 953 [2021-06-05 21:34:27,321 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 346 [2021-06-05 21:34:27,483 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 297 [2021-06-05 21:34:28,224 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 256 [2021-06-05 21:34:28,414 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 289 [2021-06-05 21:34:29,133 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 262 [2021-06-05 21:34:29,731 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-06-05 21:34:30,008 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 378 [2021-06-05 21:34:30,410 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 410 [2021-06-05 21:34:31,061 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 560 [2021-06-05 21:34:31,912 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 595 [2021-06-05 21:34:32,055 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 254 [2021-06-05 21:34:32,944 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 233 [2021-06-05 21:34:33,794 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 319 [2021-06-05 21:34:34,108 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 373 [2021-06-05 21:34:34,501 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 401 [2021-06-05 21:34:34,987 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 439 [2021-06-05 21:34:36,402 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1076 DAG size of output: 887 [2021-06-05 21:34:38,178 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 1212 DAG size of output: 1004 [2021-06-05 21:34:42,281 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 1979 DAG size of output: 1641 [2021-06-05 21:34:50,741 WARN L205 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-06-05 21:34:59,169 WARN L205 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-06-05 21:35:09,403 WARN L205 SmtUtils]: Spent 10.22 s on a formula simplification. DAG size of input: 3202 DAG size of output: 2270 [2021-06-05 21:35:26,891 WARN L205 SmtUtils]: Spent 17.47 s on a formula simplification. DAG size of input: 2272 DAG size of output: 2759 [2021-06-05 21:35:28,485 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1300 DAG size of output: 1279 [2021-06-05 21:35:31,732 WARN L205 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 829 DAG size of output: 1038 [2021-06-05 21:35:32,841 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 566 DAG size of output: 530 [2021-06-05 21:35:33,163 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 399 [2021-06-05 21:35:33,981 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 252 [2021-06-05 21:35:34,299 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 245 [2021-06-05 21:35:34,422 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 219 [2021-06-05 21:35:35,144 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 213 [2021-06-05 21:35:35,357 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 263 [2021-06-05 21:35:35,618 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 282 [2021-06-05 21:35:36,129 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 350 [2021-06-05 21:35:37,108 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 1044 DAG size of output: 557 [2021-06-05 21:35:37,426 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 521 [2021-06-05 21:35:38,078 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 459 [2021-06-05 21:35:38,476 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 269 [2021-06-05 21:35:38,693 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 303 [2021-06-05 21:35:38,918 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 275 [2021-06-05 21:35:39,241 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 218 [2021-06-05 21:35:39,583 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 397 [2021-06-05 21:35:41,206 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1554 DAG size of output: 803 [2021-06-05 21:35:46,526 WARN L205 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-06-05 21:35:51,860 WARN L205 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-06-05 21:35:57,446 WARN L205 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 3039 DAG size of output: 1662 [2021-06-05 21:35:57,898 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1662 [2021-06-05 21:35:58,068 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 781 [2021-06-05 21:35:58,355 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 298 [2021-06-05 21:35:59,797 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 188 [2021-06-05 21:35:59,951 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 207 [2021-06-05 21:36:00,257 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 251 [2021-06-05 21:36:00,589 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 375 [2021-06-05 21:36:01,511 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 263 [2021-06-05 21:36:02,020 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 508 [2021-06-05 21:36:04,903 WARN L205 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 986 DAG size of output: 1338 [2021-06-05 21:36:05,450 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 749 [2021-06-05 21:36:05,871 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 305 [2021-06-05 21:36:06,820 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 211 [2021-06-05 21:36:07,739 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 224 [2021-06-05 21:36:07,894 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 229 [2021-06-05 21:36:08,360 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 484 [2021-06-05 21:36:08,470 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 182 [2021-06-05 21:36:08,774 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 231 [2021-06-05 21:36:09,147 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 217 [2021-06-05 21:36:09,437 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 321 [2021-06-05 21:36:09,917 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 399 [2021-06-05 21:36:10,293 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 686 [2021-06-05 21:36:10,570 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 361 [2021-06-05 21:36:11,493 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 224 [2021-06-05 21:36:11,955 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 403 [2021-06-05 21:36:13,019 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 281 [2021-06-05 21:36:13,154 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 249 [2021-06-05 21:36:13,751 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 347 [2021-06-05 21:36:14,170 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 415 [2021-06-05 21:36:15,135 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 1350 DAG size of output: 700 [2021-06-05 21:36:16,809 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-06-05 21:36:18,481 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-06-05 21:36:19,667 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 2056 DAG size of output: 695 [2021-06-05 21:36:20,777 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 697 DAG size of output: 852 [2021-06-05 21:36:20,903 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 214 [2021-06-05 21:36:21,663 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 541 [2021-06-05 21:36:22,056 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 313 [2021-06-05 21:36:22,412 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-06-05 21:36:22,750 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-06-05 21:36:23,145 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 371 [2021-06-05 21:36:23,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:36:23,774 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:36:23,774 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:36:23,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:36:24,541 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 298 [2021-06-05 21:36:24,690 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-06-05 21:36:24,829 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-06-05 21:36:24,990 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 312 [2021-06-05 21:36:25,249 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 396 [2021-06-05 21:36:25,388 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 309 [2021-06-05 21:36:26,577 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 239 [2021-06-05 21:36:26,772 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 308 [2021-06-05 21:36:27,957 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 308 [2021-06-05 21:36:28,862 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 447 [2021-06-05 21:36:29,235 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 721 DAG size of output: 505 [2021-06-05 21:36:29,912 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 1067 DAG size of output: 653 [2021-06-05 21:36:30,028 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 256 [2021-06-05 21:36:30,770 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 238 [2021-06-05 21:36:30,958 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 315 [2021-06-05 21:36:31,202 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 343 [2021-06-05 21:36:31,822 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 245 [2021-06-05 21:36:31,971 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 271 [2021-06-05 21:36:32,414 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 495 [2021-06-05 21:36:33,052 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 250 [2021-06-05 21:36:33,203 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 278 [2021-06-05 21:36:33,931 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 383 [2021-06-05 21:36:34,209 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 406 [2021-06-05 21:36:35,075 WARN L205 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 740 [2021-06-05 21:36:36,439 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 257 [2021-06-05 21:36:36,616 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 302 [2021-06-05 21:36:36,939 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 450 [2021-06-05 21:36:37,349 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 489 [2021-06-05 21:36:38,362 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 322 [2021-06-05 21:36:38,583 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 351 [2021-06-05 21:36:38,824 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 378 [2021-06-05 21:36:39,583 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 704 [2021-06-05 21:36:41,424 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1540 DAG size of output: 1209 [2021-06-05 21:36:44,414 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 2433 DAG size of output: 1679 [2021-06-05 21:36:47,887 WARN L205 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-06-05 21:36:51,371 WARN L205 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-06-05 21:36:54,892 WARN L205 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 2450 DAG size of output: 1487 [2021-06-05 21:37:00,059 WARN L205 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 1489 DAG size of output: 1519 [2021-06-05 21:37:00,319 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1328 [2021-06-05 21:37:00,469 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-06-05 21:37:01,338 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 474 [2021-06-05 21:37:02,271 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 349 [2021-06-05 21:37:02,434 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 366 [2021-06-05 21:37:02,725 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 389 [2021-06-05 21:37:03,021 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 487 [2021-06-05 21:37:03,477 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 1443 DAG size of output: 594 [2021-06-05 21:37:04,026 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 1486 DAG size of output: 610 [2021-06-05 21:37:04,746 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-06-05 21:37:05,463 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-06-05 21:37:06,301 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 683 [2021-06-05 21:37:06,827 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 451 [2021-06-05 21:37:07,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:37:08,164 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:37:08,164 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:37:08,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:37:08,843 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 316 [2021-06-05 21:37:08,984 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 329 [2021-06-05 21:37:09,155 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-06-05 21:37:09,334 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-06-05 21:37:09,552 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 331 [2021-06-05 21:37:09,781 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 381 [2021-06-05 21:37:10,021 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 361 [2021-06-05 21:37:10,186 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 306 [2021-06-05 21:37:10,425 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 287 [2021-06-05 21:37:10,771 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 298 [2021-06-05 21:37:11,122 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 351 [2021-06-05 21:37:11,330 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 311 [2021-06-05 21:37:11,709 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 285 [2021-06-05 21:37:11,956 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 285 [2021-06-05 21:37:12,091 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 298 [2021-06-05 21:37:12,310 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 367 [2021-06-05 21:37:12,729 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 491 [2021-06-05 21:37:13,161 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 494 [2021-06-05 21:37:13,348 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 269 [2021-06-05 21:37:13,466 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 226 [2021-06-05 21:37:13,600 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 199 [2021-06-05 21:37:14,749 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 292 [2021-06-05 21:37:15,440 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-06-05 21:37:16,127 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-06-05 21:37:16,909 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 651 [2021-06-05 21:37:17,773 WARN L205 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 691 [2021-06-05 21:37:19,232 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 234 [2021-06-05 21:37:19,573 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 321 [2021-06-05 21:37:20,267 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 621 [2021-06-05 21:37:21,096 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 211 [2021-06-05 21:37:21,517 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 284 [2021-06-05 21:37:21,751 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 289 [2021-06-05 21:37:22,502 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 396 [2021-06-05 21:37:22,935 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-06-05 21:37:23,366 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-06-05 21:37:23,860 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 1031 DAG size of output: 465 [2021-06-05 21:37:24,005 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 278 [2021-06-05 21:37:24,138 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 285 [2021-06-05 21:37:24,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:37:24,443 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:37:24,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:37:24,443 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:37:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:24,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564216657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:24,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:24,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:37:24,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695965351] [2021-06-05 21:37:24,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:37:24,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:37:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:24,472 INFO L87 Difference]: Start difference. First operand 947 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:37:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:24,877 INFO L93 Difference]: Finished difference Result 1018 states and 3228 transitions. [2021-06-05 21:37:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:37:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:24,879 INFO L225 Difference]: With dead ends: 1018 [2021-06-05 21:37:24,879 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 21:37:24,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:37:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 21:37:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 951. [2021-06-05 21:37:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-06-05 21:37:24,889 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-06-05 21:37:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:24,889 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-06-05 21:37:24,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:37:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-06-05 21:37:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:24,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:24,890 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:25,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20681 [2021-06-05 21:37:25,105 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash 754746123, now seen corresponding path program 206 times [2021-06-05 21:37:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:25,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981445676] [2021-06-05 21:37:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:25,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:25,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981445676] [2021-06-05 21:37:25,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981445676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:25,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141425816] [2021-06-05 21:37:25,203 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 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 21:37:25,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:37:25,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:25,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:37:25,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:25,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:37:25,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:37:26,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:37:26,721 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:37:26,722 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:37:26,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:37:27,391 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-06-05 21:37:27,547 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 311 [2021-06-05 21:37:28,336 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 219 [2021-06-05 21:37:28,523 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 280 [2021-06-05 21:37:28,669 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 310 [2021-06-05 21:37:28,783 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 246 [2021-06-05 21:37:28,914 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 242 [2021-06-05 21:37:29,818 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 264 [2021-06-05 21:37:30,007 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 284 [2021-06-05 21:37:30,247 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 307 [2021-06-05 21:37:30,623 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 430 [2021-06-05 21:37:31,165 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-06-05 21:37:31,709 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-06-05 21:37:32,352 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 466 [2021-06-05 21:37:32,789 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 328 [2021-06-05 21:37:33,586 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 190 [2021-06-05 21:37:33,753 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 217 [2021-06-05 21:37:33,978 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2021-06-05 21:37:34,412 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 190 [2021-06-05 21:37:35,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:37:35,635 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:37:35,635 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:37:35,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:37:36,992 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 263 [2021-06-05 21:37:37,180 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 285 [2021-06-05 21:37:38,446 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 252 [2021-06-05 21:37:38,869 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 424 [2021-06-05 21:37:40,137 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 266 [2021-06-05 21:37:41,111 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 291 [2021-06-05 21:37:41,513 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 429 [2021-06-05 21:37:42,435 WARN L205 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 1007 DAG size of output: 696 [2021-06-05 21:37:43,555 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1051 DAG size of output: 720 [2021-06-05 21:37:44,890 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-06-05 21:37:46,227 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-06-05 21:37:47,374 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1098 DAG size of output: 513 [2021-06-05 21:37:47,479 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 513 [2021-06-05 21:37:47,779 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 458 [2021-06-05 21:37:48,029 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 276 [2021-06-05 21:37:48,711 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 243 [2021-06-05 21:37:48,861 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-06-05 21:37:49,008 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-06-05 21:37:49,196 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 271 [2021-06-05 21:37:49,384 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 280 [2021-06-05 21:37:49,512 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 193 [2021-06-05 21:37:50,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:37:50,328 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:37:50,328 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:37:50,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:37:51,539 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 230 [2021-06-05 21:37:51,699 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 277 [2021-06-05 21:37:52,533 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 243 [2021-06-05 21:37:52,851 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-06-05 21:37:53,174 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-06-05 21:37:53,561 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 430 [2021-06-05 21:37:53,907 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 422 [2021-06-05 21:37:54,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:37:54,620 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:37:54,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:37:54,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:37:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:54,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141425816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:54,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:37:54,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:37:54,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268748595] [2021-06-05 21:37:54,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:37:54,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:37:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:37:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:37:54,648 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:37:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:37:55,170 INFO L93 Difference]: Finished difference Result 1044 states and 3286 transitions. [2021-06-05 21:37:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:37:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:37:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:37:55,172 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 21:37:55,172 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 21:37:55,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:37:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 21:37:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 951. [2021-06-05 21:37:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:37:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-06-05 21:37:55,182 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-06-05 21:37:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:37:55,182 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-06-05 21:37:55,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:37:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-06-05 21:37:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:37:55,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:37:55,183 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:37:55,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28149,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:37:55,397 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:37:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:37:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1412276551, now seen corresponding path program 207 times [2021-06-05 21:37:55,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:37:55,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942924450] [2021-06-05 21:37:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:37:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:37:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:37:55,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:37:55,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942924450] [2021-06-05 21:37:55,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942924450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:37:55,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692701125] [2021-06-05 21:37:55,496 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 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 21:37:55,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:37:55,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:37:55,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 21:37:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:37:55,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:37:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:37:56,670 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 316 [2021-06-05 21:37:56,845 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 277 [2021-06-05 21:37:56,986 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 274 [2021-06-05 21:37:58,221 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 272 [2021-06-05 21:37:58,357 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 266 [2021-06-05 21:37:58,551 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 330 [2021-06-05 21:37:58,823 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 433 [2021-06-05 21:37:59,196 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 736 DAG size of output: 517 [2021-06-05 21:37:59,403 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 216 [2021-06-05 21:38:00,294 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 321 [2021-06-05 21:38:00,486 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 339 [2021-06-05 21:38:01,173 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-06-05 21:38:01,865 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-06-05 21:38:02,606 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 1149 DAG size of output: 749 [2021-06-05 21:38:03,033 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 513 [2021-06-05 21:38:03,181 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 281 [2021-06-05 21:38:03,870 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 477 [2021-06-05 21:38:04,561 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 282 [2021-06-05 21:38:05,080 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 258 [2021-06-05 21:38:05,271 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-06-05 21:38:05,451 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-06-05 21:38:05,650 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 328 [2021-06-05 21:38:05,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:38:05,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:05,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:38:05,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:38:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:05,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692701125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:05,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:05,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:38:05,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769207214] [2021-06-05 21:38:05,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:38:05,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:38:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:05,972 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:38:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:06,468 INFO L93 Difference]: Finished difference Result 1074 states and 3428 transitions. [2021-06-05 21:38:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:38:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:38:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:06,470 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 21:38:06,470 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 21:38:06,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:38:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 21:38:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1006. [2021-06-05 21:38:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.261691542288557) internal successors, (3278), 1005 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3278 transitions. [2021-06-05 21:38:06,481 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3278 transitions. Word has length 20 [2021-06-05 21:38:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:06,481 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3278 transitions. [2021-06-05 21:38:06,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:38:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3278 transitions. [2021-06-05 21:38:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:38:06,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:06,482 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:06,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29769,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:38:06,683 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:06,683 INFO L82 PathProgramCache]: Analyzing trace with hash -553402021, now seen corresponding path program 208 times [2021-06-05 21:38:06,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:06,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831941719] [2021-06-05 21:38:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:06,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:06,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831941719] [2021-06-05 21:38:06,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831941719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:06,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702607841] [2021-06-05 21:38:06,780 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 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 21:38:06,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:38:06,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:06,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:38:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:07,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:07,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:38:07,889 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 290 [2021-06-05 21:38:08,086 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 298 [2021-06-05 21:38:08,202 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 274 [2021-06-05 21:38:09,155 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 292 [2021-06-05 21:38:09,996 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-06-05 21:38:10,201 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-06-05 21:38:10,418 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 729 DAG size of output: 418 [2021-06-05 21:38:11,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:38:11,677 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:38:11,677 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:38:11,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:38:12,359 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 291 [2021-06-05 21:38:13,299 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 297 [2021-06-05 21:38:13,521 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-06-05 21:38:13,749 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-06-05 21:38:14,009 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 345 [2021-06-05 21:38:14,473 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 363 [2021-06-05 21:38:14,658 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 242 [2021-06-05 21:38:14,968 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 243 [2021-06-05 21:38:15,354 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-06-05 21:38:15,523 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-06-05 21:38:15,707 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 280 [2021-06-05 21:38:15,854 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 272 [2021-06-05 21:38:16,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:38:17,081 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:38:17,081 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:38:17,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:38:17,828 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 238 [2021-06-05 21:38:17,942 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 246 [2021-06-05 21:38:18,073 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 311 [2021-06-05 21:38:18,244 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 307 [2021-06-05 21:38:18,347 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 260 [2021-06-05 21:38:18,500 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 278 [2021-06-05 21:38:19,076 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 331 [2021-06-05 21:38:20,123 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 344 [2021-06-05 21:38:20,438 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 487 [2021-06-05 21:38:20,828 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 527 [2021-06-05 21:38:21,400 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-06-05 21:38:21,829 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-06-05 21:38:22,347 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 565 [2021-06-05 21:38:22,550 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 670 [2021-06-05 21:38:23,028 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 419 [2021-06-05 21:38:23,132 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 215 [2021-06-05 21:38:23,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:38:24,110 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:38:24,110 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:38:24,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:38:25,232 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 258 [2021-06-05 21:38:25,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:38:25,922 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:38:25,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:38:25,922 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:38:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702607841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:25,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:38:25,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:38:25,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105195152] [2021-06-05 21:38:25,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:38:25,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:38:25,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:38:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:38:25,950 INFO L87 Difference]: Start difference. First operand 1006 states and 3278 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:38:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:38:26,681 INFO L93 Difference]: Finished difference Result 1179 states and 3670 transitions. [2021-06-05 21:38:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:38:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:38:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:38:26,683 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 21:38:26,683 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 21:38:26,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:38:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 21:38:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1019. [2021-06-05 21:38:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.2652259332023577) internal successors, (3324), 1018 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:38:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3324 transitions. [2021-06-05 21:38:26,694 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3324 transitions. Word has length 20 [2021-06-05 21:38:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:38:26,694 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3324 transitions. [2021-06-05 21:38:26,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:38:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3324 transitions. [2021-06-05 21:38:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:38:26,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:38:26,695 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:38:26,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30486 [2021-06-05 21:38:26,896 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:38:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:38:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1157211287, now seen corresponding path program 209 times [2021-06-05 21:38:26,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:38:26,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329355226] [2021-06-05 21:38:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:38:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:38:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:38:26,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:38:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329355226] [2021-06-05 21:38:26,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329355226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:38:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424141622] [2021-06-05 21:38:26,996 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 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 21:38:27,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:38:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:38:27,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:38:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:38:27,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:38:27,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:38:28,670 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 253 [2021-06-05 21:38:28,860 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 325 [2021-06-05 21:38:29,125 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-06-05 21:38:29,379 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-06-05 21:38:29,672 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 371 [2021-06-05 21:38:30,024 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 425 [2021-06-05 21:38:30,279 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 341 [2021-06-05 21:38:30,696 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 222 [2021-06-05 21:38:31,225 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-06-05 21:38:31,420 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-06-05 21:38:31,609 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 301 [2021-06-05 21:38:31,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:38:32,206 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:38:32,207 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:38:32,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:38:33,094 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 350 [2021-06-05 21:38:33,248 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 370 [2021-06-05 21:38:33,421 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 397 [2021-06-05 21:38:33,631 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 419 [2021-06-05 21:38:33,874 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 440 [2021-06-05 21:38:34,362 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 457 [2021-06-05 21:38:34,716 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-06-05 21:38:35,067 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-06-05 21:38:35,485 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 488 [2021-06-05 21:38:35,748 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 489 [2021-06-05 21:38:36,091 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 381 [2021-06-05 21:38:36,306 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 351 [2021-06-05 21:38:36,554 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 348 [2021-06-05 21:38:36,958 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 300 [2021-06-05 21:38:37,325 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 250 [2021-06-05 21:38:37,670 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 316 [2021-06-05 21:38:38,103 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 341 [2021-06-05 21:38:38,394 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 364 [2021-06-05 21:38:38,716 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 381 [2021-06-05 21:38:39,050 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 394 [2021-06-05 21:38:39,446 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 418 [2021-06-05 21:38:39,901 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-06-05 21:38:40,364 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-06-05 21:38:40,906 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 430 [2021-06-05 21:38:41,814 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 468 [2021-06-05 21:38:42,243 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 425 [2021-06-05 21:38:42,545 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-06-05 21:38:42,778 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 349 [2021-06-05 21:38:42,984 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2021-06-05 21:38:43,644 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 230 [2021-06-05 21:38:43,776 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 238 [2021-06-05 21:38:43,944 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 250 [2021-06-05 21:38:44,149 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 261 [2021-06-05 21:38:44,335 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 286 [2021-06-05 21:38:44,586 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-06-05 21:38:44,745 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 275 [2021-06-05 21:38:44,877 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 210 [2021-06-05 21:38:45,874 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-06-05 21:38:46,235 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-06-05 21:38:46,564 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 276 [2021-06-05 21:38:47,102 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 299 [2021-06-05 21:38:47,356 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 263 [2021-06-05 21:38:47,985 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 203 [2021-06-05 21:38:48,154 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-06-05 21:38:48,329 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-06-05 21:38:48,490 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 206 [2021-06-05 21:38:48,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:38:49,297 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:38:49,298 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:38:49,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:38:50,480 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-06-05 21:38:50,713 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-06-05 21:38:50,972 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 370 [2021-06-05 21:38:51,391 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 473 [2021-06-05 21:38:51,672 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 292 [2021-06-05 21:38:52,707 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 308 [2021-06-05 21:38:53,267 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 567 [2021-06-05 21:38:53,618 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 350 [2021-06-05 21:38:54,607 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 282 [2021-06-05 21:38:54,776 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 292 [2021-06-05 21:38:55,022 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 365 [2021-06-05 21:38:55,409 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-06-05 21:38:55,804 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-06-05 21:38:56,260 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 968 DAG size of output: 445 [2021-06-05 21:38:56,743 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 589 [2021-06-05 21:38:57,122 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 460 [2021-06-05 21:38:57,367 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 232 [2021-06-05 21:38:58,208 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 268 [2021-06-05 21:38:58,520 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-06-05 21:38:58,822 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-06-05 21:38:59,147 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 382 [2021-06-05 21:38:59,382 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 346 [2021-06-05 21:39:00,191 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 215 [2021-06-05 21:39:00,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:39:00,659 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:39:00,659 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:39:00,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:39:02,108 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 272 [2021-06-05 21:39:02,254 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 311 [2021-06-05 21:39:02,761 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 358 [2021-06-05 21:39:03,027 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-06-05 21:39:03,306 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-06-05 21:39:03,624 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 414 [2021-06-05 21:39:03,822 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 451 [2021-06-05 21:39:04,038 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 340 [2021-06-05 21:39:04,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:39:04,636 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:39:04,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:39:04,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:39:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:04,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424141622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:04,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:04,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:39:04,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10056775] [2021-06-05 21:39:04,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:39:04,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:04,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:39:04,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:39:04,664 INFO L87 Difference]: Start difference. First operand 1019 states and 3324 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:39:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:05,187 INFO L93 Difference]: Finished difference Result 1092 states and 3484 transitions. [2021-06-05 21:39:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:39:05,188 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:39:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:05,189 INFO L225 Difference]: With dead ends: 1092 [2021-06-05 21:39:05,189 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 21:39:05,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:39:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 21:39:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-06-05 21:39:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-06-05 21:39:05,199 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-06-05 21:39:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:05,199 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-06-05 21:39:05,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:39:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-06-05 21:39:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:39:05,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:05,200 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:05,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31869,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:39:05,401 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:05,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1648351013, now seen corresponding path program 210 times [2021-06-05 21:39:05,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:05,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904020450] [2021-06-05 21:39:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:05,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:05,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904020450] [2021-06-05 21:39:05,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904020450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:05,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483345019] [2021-06-05 21:39:05,511 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 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 21:39:05,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:39:05,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:39:05,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:39:05,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:05,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:39:05,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:39:07,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:39:07,623 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:39:07,624 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:39:07,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:39:08,688 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 361 [2021-06-05 21:39:08,889 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-06-05 21:39:09,088 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-06-05 21:39:09,346 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 388 [2021-06-05 21:39:09,643 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 494 [2021-06-05 21:39:09,866 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 378 [2021-06-05 21:39:10,288 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 256 [2021-06-05 21:39:10,704 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 267 [2021-06-05 21:39:10,878 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 316 [2021-06-05 21:39:11,024 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 301 [2021-06-05 21:39:11,634 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 236 [2021-06-05 21:39:11,867 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 231 [2021-06-05 21:39:12,113 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-06-05 21:39:12,370 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-06-05 21:39:12,667 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 353 [2021-06-05 21:39:12,819 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 356 [2021-06-05 21:39:13,118 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-06-05 21:39:13,300 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 352 [2021-06-05 21:39:14,721 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 273 [2021-06-05 21:39:14,933 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 294 [2021-06-05 21:39:15,199 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 343 [2021-06-05 21:39:15,531 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-06-05 21:39:15,848 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-06-05 21:39:16,174 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 327 [2021-06-05 21:39:16,595 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 407 [2021-06-05 21:39:17,029 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 286 [2021-06-05 21:39:17,198 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 266 [2021-06-05 21:39:17,939 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 229 [2021-06-05 21:39:18,194 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-06-05 21:39:18,448 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-06-05 21:39:18,728 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 318 [2021-06-05 21:39:19,086 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 371 [2021-06-05 21:39:19,227 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 293 [2021-06-05 21:39:20,027 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 309 [2021-06-05 21:39:20,221 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-06-05 21:39:20,418 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-06-05 21:39:20,645 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 362 [2021-06-05 21:39:20,845 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 265 [2021-06-05 21:39:21,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 21:39:21,616 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 21:39:21,617 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 21:39:21,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 21:39:22,254 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 249 [2021-06-05 21:39:22,389 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 288 [2021-06-05 21:39:23,273 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-06-05 21:39:23,410 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-06-05 21:39:23,564 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 217 [2021-06-05 21:39:23,691 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 267 [2021-06-05 21:39:24,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 21:39:25,031 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 21:39:25,031 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 21:39:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 21:39:26,266 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 219 [2021-06-05 21:39:26,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 21:39:26,995 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 21:39:26,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:39:26,996 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 21:39:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:27,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483345019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:27,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:39:27,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 21:39:27,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349637191] [2021-06-05 21:39:27,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 21:39:27,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:39:27,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 21:39:27,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:39:27,023 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:39:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:39:27,468 INFO L93 Difference]: Finished difference Result 1112 states and 3526 transitions. [2021-06-05 21:39:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:39:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-06-05 21:39:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:39:27,470 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 21:39:27,470 INFO L226 Difference]: Without dead ends: 1102 [2021-06-05 21:39:27,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 509.3ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:39:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-06-05 21:39:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1022. [2021-06-05 21:39:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:39:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-06-05 21:39:27,480 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-06-05 21:39:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:39:27,480 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-06-05 21:39:27,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 21:39:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-06-05 21:39:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:39:27,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:39:27,481 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:39:27,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34240 [2021-06-05 21:39:27,682 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:39:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:39:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1573530903, now seen corresponding path program 211 times [2021-06-05 21:39:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:39:27,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750370361] [2021-06-05 21:39:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:39:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:39:27,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:39:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750370361] [2021-06-05 21:39:27,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750370361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:39:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420191322] [2021-06-05 21:39:27,785 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 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 21:39:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:39:27,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 21:39:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:39:28,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:39:28,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:39:29,084 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 260 [2021-06-05 21:39:29,191 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 319 [2021-06-05 21:39:29,366 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 351 [2021-06-05 21:39:29,481 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 265 [2021-06-05 21:39:29,649 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 253 [2021-06-05 21:39:30,258 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 296 [2021-06-05 21:39:30,682 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 361 [2021-06-05 21:39:30,888 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 390 [2021-06-05 21:39:31,169 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 434 [2021-06-05 21:39:31,377 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 286 [2021-06-05 21:39:32,647 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 244 [2021-06-05 21:39:32,872 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 289 [2021-06-05 21:39:33,086 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 372 [2021-06-05 21:39:33,664 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 1157 DAG size of output: 652 [2021-06-05 21:39:34,367 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-06-05 21:39:35,071 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-06-05 21:39:35,860 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 715 [2021-06-05 21:39:37,354 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 717 DAG size of output: 423 [2021-06-05 21:39:38,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:39:38,613 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 21:39:38,614 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 21:39:38,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 21:39:39,138 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 342 [2021-06-05 21:39:39,645 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 331 [2021-06-05 21:39:39,825 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 481 [2021-06-05 21:39:40,051 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 501 [2021-06-05 21:39:40,334 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 529 [2021-06-05 21:39:40,661 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 544 [2021-06-05 21:39:41,107 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 288 [2021-06-05 21:39:41,723 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 414 [2021-06-05 21:39:41,925 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 436 [2021-06-05 21:39:42,156 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 452 [2021-06-05 21:39:42,791 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-06-05 21:39:43,422 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-06-05 21:39:44,197 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 807 [2021-06-05 21:39:45,266 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 809 DAG size of output: 994 [2021-06-05 21:39:46,185 WARN L205 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 881 [2021-06-05 21:39:46,833 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 648 [2021-06-05 21:39:47,076 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 566 [2021-06-05 21:39:47,391 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 414 [2021-06-05 21:39:47,547 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 388 [2021-06-05 21:39:47,731 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2021-06-05 21:39:48,456 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 268 [2021-06-05 21:39:49,144 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-06-05 21:39:49,331 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 300 [2021-06-05 21:39:49,685 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 367 [2021-06-05 21:39:50,281 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 551 [2021-06-05 21:39:51,136 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 677 [2021-06-05 21:39:52,572 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 259 [2021-06-05 21:39:52,860 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 320 [2021-06-05 21:39:53,259 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 397 [2021-06-05 21:39:53,741 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 418 [2021-06-05 21:39:54,379 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 507 [2021-06-05 21:39:56,093 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1053 DAG size of output: 866 [2021-06-05 21:39:56,824 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 607 [2021-06-05 21:39:57,317 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 545 [2021-06-05 21:39:57,545 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-06-05 21:39:58,365 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 343 [2021-06-05 21:39:58,852 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 291 [2021-06-05 21:39:59,263 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 451 [2021-06-05 21:39:59,781 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 472 [2021-06-05 21:40:00,401 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 488 [2021-06-05 21:40:01,462 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 885 DAG size of output: 764 [2021-06-05 21:40:01,930 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 549 [2021-06-05 21:40:02,136 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 345 [2021-06-05 21:40:02,827 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 278 [2021-06-05 21:40:03,543 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 253 [2021-06-05 21:40:03,955 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 418 [2021-06-05 21:40:04,476 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 446 [2021-06-05 21:40:05,101 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 474 [2021-06-05 21:40:05,961 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 568 [2021-06-05 21:40:07,320 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 994 DAG size of output: 861 [2021-06-05 21:40:10,137 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 1302 DAG size of output: 1160 [2021-06-05 21:40:15,019 WARN L205 SmtUtils]: Spent 4.88 s on a formula simplification. DAG size of input: 1780 DAG size of output: 1685 [2021-06-05 21:40:15,248 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 348 [2021-06-05 21:40:15,588 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 375 [2021-06-05 21:40:15,815 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 333 [2021-06-05 21:40:16,131 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 349 [2021-06-05 21:40:16,603 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 252 [2021-06-05 21:40:16,758 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 270 [2021-06-05 21:40:16,955 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-06-05 21:40:17,123 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 287 [2021-06-05 21:40:17,663 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-06-05 21:40:18,047 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 477 [2021-06-05 21:40:18,520 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 495 [2021-06-05 21:40:19,255 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 552 [2021-06-05 21:40:20,271 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 747 DAG size of output: 634 [2021-06-05 21:40:20,646 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 359 [2021-06-05 21:40:20,851 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 316 [2021-06-05 21:40:20,975 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 276 [2021-06-05 21:40:21,122 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 283 [2021-06-05 21:40:21,377 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 250 [2021-06-05 21:40:21,599 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 359 [2021-06-05 21:40:21,996 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 503 [2021-06-05 21:40:22,498 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 525 [2021-06-05 21:40:23,102 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 533 [2021-06-05 21:40:23,706 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 267 [2021-06-05 21:40:24,584 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 587 [2021-06-05 21:40:26,782 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 996 DAG size of output: 805 [2021-06-05 21:40:26,901 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 256 [2021-06-05 21:40:27,122 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 265 [2021-06-05 21:40:27,680 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 215 [2021-06-05 21:40:28,324 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 264 [2021-06-05 21:40:28,646 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 304 [2021-06-05 21:40:29,207 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 238 [2021-06-05 21:40:29,403 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 257 [2021-06-05 21:40:29,541 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 273 [2021-06-05 21:40:29,737 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 281 [2021-06-05 21:40:30,315 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 426 [2021-06-05 21:40:32,674 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 1211 DAG size of output: 891 [2021-06-05 21:40:40,208 WARN L205 SmtUtils]: Spent 7.53 s on a formula simplification. DAG size of input: 2487 DAG size of output: 2146 [2021-06-05 21:40:41,167 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 716 [2021-06-05 21:40:41,385 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 369 [2021-06-05 21:40:41,705 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-06-05 21:40:42,038 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 382 [2021-06-05 21:40:42,259 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 370 [2021-06-05 21:40:42,522 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 342 [2021-06-05 21:40:43,048 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 267 [2021-06-05 21:40:43,211 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 275 [2021-06-05 21:40:43,489 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 428 [2021-06-05 21:40:43,995 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 586 [2021-06-05 21:40:44,259 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 353 [2021-06-05 21:40:44,554 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 352 [2021-06-05 21:40:45,256 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 325 [2021-06-05 21:40:45,639 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 470 [2021-06-05 21:40:46,727 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 813 DAG size of output: 755 [2021-06-05 21:40:46,903 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 343 [2021-06-05 21:40:47,148 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 363 [2021-06-05 21:40:47,685 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 273 [2021-06-05 21:40:47,813 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 332 [2021-06-05 21:40:48,212 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 270 [2021-06-05 21:40:48,465 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 429 [2021-06-05 21:40:48,813 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 455 [2021-06-05 21:40:49,379 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 549 [2021-06-05 21:40:50,167 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 649 [2021-06-05 21:40:51,131 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 671 [2021-06-05 21:40:53,475 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 1203 DAG size of output: 1037 [2021-06-05 21:40:53,592 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 255 [2021-06-05 21:40:53,743 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 266 [2021-06-05 21:40:54,297 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 254 [2021-06-05 21:40:54,437 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 262 [2021-06-05 21:40:54,544 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 242 [2021-06-05 21:40:55,074 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 246 [2021-06-05 21:40:55,220 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 254 [2021-06-05 21:40:55,426 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 283 [2021-06-05 21:40:55,831 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 364 [2021-06-05 21:40:56,030 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 264 [2021-06-05 21:40:56,631 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 247 [2021-06-05 21:40:56,767 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-06-05 21:40:56,877 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 243 [2021-06-05 21:40:57,505 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 274 [2021-06-05 21:40:57,856 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 369 [2021-06-05 21:40:58,314 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 409 [2021-06-05 21:40:59,346 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 721 DAG size of output: 540 [2021-06-05 21:41:02,436 WARN L205 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 1571 DAG size of output: 1210 [2021-06-05 21:41:02,602 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 563 [2021-06-05 21:41:03,502 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 270 [2021-06-05 21:41:03,636 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 285 [2021-06-05 21:41:04,301 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 278 [2021-06-05 21:41:04,475 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 301 [2021-06-05 21:41:04,847 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 377 [2021-06-05 21:41:05,352 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 453 [2021-06-05 21:41:06,076 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-06-05 21:41:06,801 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 350 [2021-06-05 21:41:07,187 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 432 [2021-06-05 21:41:07,699 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 483 [2021-06-05 21:41:08,343 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 506 [2021-06-05 21:41:09,624 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 856 DAG size of output: 678 [2021-06-05 21:41:09,851 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 385 [2021-06-05 21:41:10,040 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 399 [2021-06-05 21:41:10,753 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 312 [2021-06-05 21:41:11,270 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 208 [2021-06-05 21:41:11,474 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 247 [2021-06-05 21:41:11,962 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 458 [2021-06-05 21:41:12,563 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 476 [2021-06-05 21:41:13,383 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 620 [2021-06-05 21:41:13,582 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 379 [2021-06-05 21:41:14,073 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 246 [2021-06-05 21:41:14,332 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 306 [2021-06-05 21:41:14,797 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 221 [2021-06-05 21:41:14,978 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 258 [2021-06-05 21:41:15,424 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 470 [2021-06-05 21:41:16,070 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 584 [2021-06-05 21:41:16,923 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 729 [2021-06-05 21:41:17,921 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 756 [2021-06-05 21:41:20,014 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 1058 DAG size of output: 1016 [2021-06-05 21:41:23,701 WARN L205 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 1591 DAG size of output: 1440 [2021-06-05 21:41:27,931 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 1650 DAG size of output: 1493 [2021-06-05 21:41:32,854 WARN L205 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 1836 DAG size of output: 1636 [2021-06-05 21:41:42,078 WARN L205 SmtUtils]: Spent 9.21 s on a formula simplification. DAG size of input: 2963 DAG size of output: 2563 [2021-06-05 21:42:00,297 WARN L205 SmtUtils]: Spent 18.20 s on a formula simplification. DAG size of input: 4614 DAG size of output: 4052 [2021-06-05 21:42:01,445 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 800 DAG size of output: 976 [2021-06-05 21:42:02,696 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 716 DAG size of output: 682 [2021-06-05 21:42:02,948 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 358 [2021-06-05 21:42:03,051 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 248 [2021-06-05 21:42:04,135 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 227 [2021-06-05 21:42:04,433 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 229 [2021-06-05 21:42:04,687 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 262 [2021-06-05 21:42:05,002 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 387 [2021-06-05 21:42:05,168 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 330 [2021-06-05 21:42:05,645 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 234 [2021-06-05 21:42:05,885 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 285 [2021-06-05 21:42:06,125 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 301 [2021-06-05 21:42:06,503 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 392 [2021-06-05 21:42:06,802 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 369 [2021-06-05 21:42:06,984 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 354 [2021-06-05 21:42:07,159 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 299 [2021-06-05 21:42:07,415 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 243 [2021-06-05 21:42:07,589 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 257 [2021-06-05 21:42:07,960 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 425 [2021-06-05 21:42:08,156 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 317 [2021-06-05 21:42:08,508 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 251 [2021-06-05 21:42:08,719 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 265 [2021-06-05 21:42:09,443 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 457 [2021-06-05 21:42:10,660 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 791 DAG size of output: 601 [2021-06-05 21:42:11,771 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 903 DAG size of output: 569 [2021-06-05 21:42:13,069 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 917 DAG size of output: 577 [2021-06-05 21:42:13,312 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 556 [2021-06-05 21:42:13,645 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 407 [2021-06-05 21:42:14,388 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 252 [2021-06-05 21:42:14,877 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 196 [2021-06-05 21:42:15,105 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 226 [2021-06-05 21:42:15,434 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 301 [2021-06-05 21:42:15,898 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 387 [2021-06-05 21:42:16,056 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 381 [2021-06-05 21:42:16,240 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2021-06-05 21:42:17,052 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 196 [2021-06-05 21:42:17,216 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 212 [2021-06-05 21:42:17,418 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 232 [2021-06-05 21:42:17,820 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 408 [2021-06-05 21:42:18,467 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 540 [2021-06-05 21:42:19,655 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 806 DAG size of output: 647 [2021-06-05 21:42:20,390 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 597 [2021-06-05 21:42:20,897 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 542 [2021-06-05 21:42:21,170 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 343 [2021-06-05 21:42:21,614 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 303 [2021-06-05 21:42:21,826 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 317 [2021-06-05 21:42:22,446 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 264 [2021-06-05 21:42:22,636 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 278 [2021-06-05 21:42:23,129 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 413 [2021-06-05 21:42:23,706 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 422 [2021-06-05 21:42:24,731 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 832 DAG size of output: 690 [2021-06-05 21:42:25,221 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 554 [2021-06-05 21:42:25,393 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 493 [2021-06-05 21:42:25,967 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 219 [2021-06-05 21:42:26,411 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 210 [2021-06-05 21:42:26,601 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 307 [2021-06-05 21:42:26,969 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 400 [2021-06-05 21:42:27,447 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 427 [2021-06-05 21:42:27,990 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 446 [2021-06-05 21:42:28,770 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 589 [2021-06-05 21:42:30,037 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 947 DAG size of output: 808 [2021-06-05 21:42:32,442 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 1252 DAG size of output: 1075 [2021-06-05 21:42:36,331 WARN L205 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 1464 DAG size of output: 1303 [2021-06-05 21:42:41,649 WARN L205 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 1926 DAG size of output: 1441 [2021-06-05 21:42:42,732 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 715 DAG size of output: 728 [2021-06-05 21:42:42,974 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 631 [2021-06-05 21:42:43,690 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 672 [2021-06-05 21:42:43,866 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 551 [2021-06-05 21:42:44,118 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 405 [2021-06-05 21:42:44,431 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 389 [2021-06-05 21:42:44,584 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 343 [2021-06-05 21:42:45,109 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-06-05 21:42:45,387 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 424 Received shutdown request... [2021-06-05 21:42:45,612 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 383 [2021-06-05 21:42:45,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35789 [2021-06-05 21:42:45,829 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:42:45,831 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:42:45,833 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:42:45,834 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:42:45 BasicIcfg [2021-06-05 21:42:45,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:42:45,834 INFO L168 Benchmark]: Toolchain (without parser) took 888029.92 ms. Allocated memory was 394.3 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 373.2 MB in the beginning and 1.1 GB in the end (delta: -680.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. [2021-06-05 21:42:45,834 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 394.3 MB. Free memory was 374.4 MB in the beginning and 374.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:42:45,834 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.24 ms. Allocated memory is still 394.3 MB. Free memory was 373.1 MB in the beginning and 371.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:42:45,834 INFO L168 Benchmark]: Boogie Preprocessor took 16.64 ms. Allocated memory is still 394.3 MB. Free memory was 371.7 MB in the beginning and 370.7 MB in the end (delta: 941.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:42:45,834 INFO L168 Benchmark]: RCFGBuilder took 421.96 ms. Allocated memory is still 394.3 MB. Free memory was 370.7 MB in the beginning and 376.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:42:45,834 INFO L168 Benchmark]: TraceAbstraction took 887568.46 ms. Allocated memory was 394.3 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 376.3 MB in the beginning and 1.1 GB in the end (delta: -677.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. [2021-06-05 21:42:45,834 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 0.09 ms. Allocated memory is still 394.3 MB. Free memory was 374.4 MB in the beginning and 374.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.24 ms. Allocated memory is still 394.3 MB. Free memory was 373.1 MB in the beginning and 371.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.64 ms. Allocated memory is still 394.3 MB. Free memory was 371.7 MB in the beginning and 370.7 MB in the end (delta: 941.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 421.96 ms. Allocated memory is still 394.3 MB. Free memory was 370.7 MB in the beginning and 376.3 MB in the end (delta: -5.6 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 887568.46 ms. Allocated memory was 394.3 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 376.3 MB in the beginning and 1.1 GB in the end (delta: -677.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 887475.3ms, OverallIterations: 228, TraceHistogramMax: 8, EmptinessCheckTime: 110.8ms, AutomataDifference: 43941.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4444 SDtfs, 10209 SDslu, 30662 SDs, 0 SdLazy, 54673 SolverSat, 6279 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21670.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7233 GetRequests, 2908 SyntacticMatches, 93 SemanticMatches, 4232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18689 ImplicationChecksByTransitivity, 40414.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1022occurred in iteration=226, InterpolantAutomatonStates: 3738, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 966.4ms AutomataMinimizationTime, 227 MinimizatonAttempts, 21627 StatesRemovedByMinimization, 223 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 593.3ms SsaConstructionTime, 2062.3ms SatisfiabilityAnalysisTime, 591239.3ms InterpolantComputationTime, 7691 NumberOfCodeBlocks, 7691 NumberOfCodeBlocksAsserted, 857 NumberOfCheckSat, 7241 ConstructedInterpolants, 6 QuantifiedInterpolants, 59502 SizeOfPredicates, 284 NumberOfNonLiveVariables, 14878 ConjunctsInSsa, 4464 ConjunctsInUnsatCore, 450 InterpolantComputations, 4 PerfectInterpolantSequences, 2014/10209 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