/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sum40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:29:44,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:29:44,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:29:44,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:29:44,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:29:44,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:29:44,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:29:44,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:29:44,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:29:44,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:29:44,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:29:44,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:29:44,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:29:44,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:29:44,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:29:44,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:29:44,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:29:44,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:29:44,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:29:44,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:29:44,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:29:44,432 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:29:44,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:29:44,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:29:44,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:29:44,434 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:29:44,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:29:44,434 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:29:44,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:29:44,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:29:44,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:29:44,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:29:44,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:29:44,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:29:44,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:29:44,440 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:29:44,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:29:44,440 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:29:44,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:29:44,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:29:44,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:29:44,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:29:44,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:29:44,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:29:44,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:29:44,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:29:44,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:29:44,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:29:44,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:29:44,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:29:44,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:29:44,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:29:44,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:29:44,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:29:44,761 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:29:44,761 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:29:44,762 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum40-2.i [2019-11-23 22:29:44,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f5b018e/891f56ee2d7342ff99e4d1f232fe1efd/FLAGa129b81aa [2019-11-23 22:29:45,277 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:29:45,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i [2019-11-23 22:29:45,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f5b018e/891f56ee2d7342ff99e4d1f232fe1efd/FLAGa129b81aa [2019-11-23 22:29:45,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f5b018e/891f56ee2d7342ff99e4d1f232fe1efd [2019-11-23 22:29:45,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:29:45,720 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:29:45,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:45,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:29:45,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:29:45,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733939d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45, skipping insertion in model container [2019-11-23 22:29:45,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:45,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:29:45,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:29:45,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:45,963 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:29:45,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:45,996 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:29:45,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45 WrapperNode [2019-11-23 22:29:45,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:45,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:45,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:29:45,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:29:46,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:46,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:29:46,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:29:46,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:29:46,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (1/1) ... [2019-11-23 22:29:46,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:29:46,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:29:46,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:29:46,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:29:46,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (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 [2019-11-23 22:29:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:29:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:29:46,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:29:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:29:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:29:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:29:46,555 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:29:46,555 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:29:46,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:46 BoogieIcfgContainer [2019-11-23 22:29:46,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:29:46,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:29:46,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:29:46,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:29:46,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:29:45" (1/3) ... [2019-11-23 22:29:46,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0dfb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:46, skipping insertion in model container [2019-11-23 22:29:46,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:45" (2/3) ... [2019-11-23 22:29:46,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0dfb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:46, skipping insertion in model container [2019-11-23 22:29:46,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:46" (3/3) ... [2019-11-23 22:29:46,571 INFO L109 eAbstractionObserver]: Analyzing ICFG sum40-2.i [2019-11-23 22:29:46,578 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:29:46,583 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:29:46,593 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:29:46,616 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:29:46,617 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:29:46,617 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:29:46,617 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:29:46,617 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:29:46,618 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:29:46,618 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:29:46,618 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:29:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:29:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:29:46,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,646 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,646 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:29:46,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542802738] [2019-11-23 22:29:46,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:29:46,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542802738] [2019-11-23 22:29:46,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:46,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:46,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025070764] [2019-11-23 22:29:46,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:46,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:46,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:46,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:46,840 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:29:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:46,875 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:29:46,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:46,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:29:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:46,885 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:29:46,885 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:29:46,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:29:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:29:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:29:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:29:46,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:29:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:46,921 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:29:46,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:29:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:29:46,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,923 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,923 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,924 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:29:46,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230176156] [2019-11-23 22:29:46,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:29:46,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230176156] [2019-11-23 22:29:46,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:46,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:46,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960386678] [2019-11-23 22:29:46,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:46,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:46,997 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:29:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,048 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:29:47,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:47,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:29:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,049 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:29:47,050 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:29:47,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:29:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:29:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:29:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:29:47,057 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:29:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,058 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:29:47,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:29:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:29:47,059 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,059 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,060 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:29:47,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673441095] [2019-11-23 22:29:47,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673441095] [2019-11-23 22:29:47,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:47,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:47,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081479] [2019-11-23 22:29:47,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:47,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:47,155 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:29:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,174 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:29:47,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:47,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:29:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,176 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:29:47,176 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:29:47,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:29:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:29:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:29:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:29:47,183 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:29:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,184 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:29:47,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:29:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:29:47,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,185 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,186 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:29:47,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296192965] [2019-11-23 22:29:47,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296192965] [2019-11-23 22:29:47,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725821761] [2019-11-23 22:29:47,289 INFO L94 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 [2019-11-23 22:29:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:29:47,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082273766] [2019-11-23 22:29:47,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:29:47,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:29:47,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:29:47,426 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:29:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,462 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:29:47,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:29:47,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:29:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,465 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:29:47,465 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:29:47,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:29:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:29:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:29:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:29:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:29:47,477 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:29:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,480 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:29:47,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:29:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:29:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:29:47,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,482 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:47,696 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:29:47,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242906150] [2019-11-23 22:29:47,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242906150] [2019-11-23 22:29:47,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431744579] [2019-11-23 22:29:47,791 INFO L92 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 [2019-11-23 22:29:47,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:47,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:47,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:47,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:29:47,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133933415] [2019-11-23 22:29:47,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:29:47,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:29:47,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:47,899 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:29:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,951 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:29:47,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:29:47,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:29:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,956 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:29:47,956 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:29:47,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:29:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:29:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:29:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:29:47,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:29:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,962 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:29:47,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:29:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:29:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:29:47,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,964 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:48,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,171 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:29:48,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035068134] [2019-11-23 22:29:48,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:48,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035068134] [2019-11-23 22:29:48,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591743939] [2019-11-23 22:29:48,254 INFO L92 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 [2019-11-23 22:29:48,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:29:48,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:29:48,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:29:48,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675428784] [2019-11-23 22:29:48,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:29:48,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:29:48,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:48,357 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:29:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,455 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:29:48,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:29:48,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:29:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,456 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:29:48,456 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:29:48,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:29:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:29:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:29:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:29:48,463 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:29:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,463 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:29:48,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:29:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:29:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:29:48,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,465 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:48,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,668 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:29:48,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457298463] [2019-11-23 22:29:48,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:29:48,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457298463] [2019-11-23 22:29:48,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344813880] [2019-11-23 22:29:48,779 INFO L92 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 [2019-11-23 22:29:48,834 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:48,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:29:48,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:29:48,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329201731] [2019-11-23 22:29:48,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:29:48,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:29:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:48,872 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:29:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,982 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 22:29:48,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:48,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:29:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,984 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:29:48,984 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:29:48,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:29:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 22:29:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:29:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:29:48,992 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:29:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,993 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:29:48,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:29:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:29:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:29:48,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,995 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:49,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,206 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:29:49,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:49,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107308242] [2019-11-23 22:29:49,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:29:49,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107308242] [2019-11-23 22:29:49,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096528080] [2019-11-23 22:29:49,337 INFO L92 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 [2019-11-23 22:29:49,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:29:49,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:49,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:29:49,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:49,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:29:49,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458856977] [2019-11-23 22:29:49,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:49,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:49,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,499 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 22:29:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:49,635 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 22:29:49,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:49,635 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 22:29:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:49,636 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:29:49,636 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:29:49,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:29:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:29:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:29:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:29:49,653 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:29:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:49,653 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:29:49,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:29:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:29:49,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:49,658 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:49,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,862 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:49,863 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 22:29:49,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:49,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101721736] [2019-11-23 22:29:49,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:29:49,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101721736] [2019-11-23 22:29:49,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513648602] [2019-11-23 22:29:49,972 INFO L92 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 [2019-11-23 22:29:50,038 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:29:50,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:50,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:50,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 22:29:50,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:50,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 22:29:50,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008464216] [2019-11-23 22:29:50,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:50,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:50,138 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 22:29:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:50,246 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 22:29:50,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:50,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 22:29:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:50,247 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:29:50,247 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:29:50,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:29:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 22:29:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:29:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 22:29:50,259 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 22:29:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:50,259 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 22:29:50,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 22:29:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:29:50,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:50,260 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:50,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,461 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 22:29:50,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:50,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036756040] [2019-11-23 22:29:50,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:50,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036756040] [2019-11-23 22:29:50,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502913136] [2019-11-23 22:29:50,591 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:29:50,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:50,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:50,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:29:50,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690829290] [2019-11-23 22:29:50,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:29:50,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:29:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:50,708 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 22:29:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:50,752 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 22:29:50,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:50,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:29:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:50,754 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:29:50,754 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:29:50,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:29:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 22:29:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:29:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:29:50,768 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 22:29:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:50,769 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:29:50,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:29:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:29:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:29:50,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:50,770 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:50,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,982 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:50,982 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 22:29:50,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:50,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895174032] [2019-11-23 22:29:50,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895174032] [2019-11-23 22:29:51,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3906737] [2019-11-23 22:29:51,102 INFO L92 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 [2019-11-23 22:29:51,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:51,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:51,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:29:51,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883076278] [2019-11-23 22:29:51,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:51,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:51,193 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 22:29:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:51,231 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 22:29:51,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:29:51,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 22:29:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:51,232 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:29:51,232 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:29:51,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:29:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:29:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:29:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:29:51,239 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:29:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:51,239 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:29:51,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:29:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:29:51,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:51,240 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:51,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,441 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 22:29:51,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:51,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763733042] [2019-11-23 22:29:51,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763733042] [2019-11-23 22:29:51,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787323052] [2019-11-23 22:29:51,551 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:29:51,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:51,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 22:29:51,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 22:29:51,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823993459] [2019-11-23 22:29:51,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:29:51,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:29:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:51,673 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 22:29:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:51,746 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 22:29:51,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:51,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 22:29:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:51,747 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:29:51,747 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:29:51,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:29:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 22:29:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:29:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 22:29:51,754 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 22:29:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:51,755 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 22:29:51,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:29:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 22:29:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:29:51,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:51,756 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:51,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,969 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:51,969 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 22:29:51,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:51,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568616866] [2019-11-23 22:29:51,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:52,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568616866] [2019-11-23 22:29:52,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19890144] [2019-11-23 22:29:52,091 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,161 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:52,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:52,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:29:52,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:52,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:52,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:29:52,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8369542] [2019-11-23 22:29:52,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:29:52,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:52,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:29:52,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:29:52,189 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 22:29:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:52,234 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 22:29:52,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:29:52,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 22:29:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:52,236 INFO L225 Difference]: With dead ends: 120 [2019-11-23 22:29:52,236 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:29:52,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:29:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:29:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 22:29:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:29:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 22:29:52,242 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 22:29:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:52,242 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 22:29:52,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:29:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 22:29:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:29:52,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:52,243 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:52,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,453 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 22:29:52,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:52,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143725578] [2019-11-23 22:29:52,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:52,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143725578] [2019-11-23 22:29:52,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204003467] [2019-11-23 22:29:52,593 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,971 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:29:52,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:52,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:52,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 22:29:53,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:53,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 22:29:53,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121287474] [2019-11-23 22:29:53,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:29:53,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:53,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:29:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:53,037 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 22:29:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:53,169 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 22:29:53,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:29:53,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 22:29:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:53,170 INFO L225 Difference]: With dead ends: 131 [2019-11-23 22:29:53,171 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:29:53,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:29:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 22:29:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:29:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 22:29:53,176 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 22:29:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:53,177 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 22:29:53,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:29:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 22:29:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:29:53,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:53,180 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:53,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:53,385 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:53,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 22:29:53,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:53,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446729110] [2019-11-23 22:29:53,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 22:29:53,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446729110] [2019-11-23 22:29:53,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745561787] [2019-11-23 22:29:53,586 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:53,969 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:29:53,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:53,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:53,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 22:29:54,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:54,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:29:54,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968746126] [2019-11-23 22:29:54,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:29:54,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:54,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:29:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:54,040 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 22:29:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:54,119 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 22:29:54,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:29:54,119 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 22:29:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:54,120 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:29:54,120 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:29:54,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:29:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 22:29:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 22:29:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 22:29:54,131 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 22:29:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:54,131 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 22:29:54,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:29:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 22:29:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 22:29:54,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:54,132 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:54,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:54,333 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:54,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:54,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 22:29:54,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:54,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356366331] [2019-11-23 22:29:54,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:54,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356366331] [2019-11-23 22:29:54,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704682919] [2019-11-23 22:29:54,487 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:54,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:29:54,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:54,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:54,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:29:54,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268968105] [2019-11-23 22:29:54,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:29:54,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:54,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:29:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:54,575 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 22:29:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:54,638 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 22:29:54,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:54,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 22:29:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:54,640 INFO L225 Difference]: With dead ends: 142 [2019-11-23 22:29:54,640 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:29:54,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:29:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 22:29:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:29:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 22:29:54,645 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 22:29:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:54,645 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 22:29:54,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:29:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 22:29:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:29:54,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:54,646 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:54,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:54,857 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 22:29:54,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:54,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945140132] [2019-11-23 22:29:54,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:55,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945140132] [2019-11-23 22:29:55,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119543473] [2019-11-23 22:29:55,053 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:55,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:55,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:55,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:29:55,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:55,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:55,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:29:55,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401050913] [2019-11-23 22:29:55,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:29:55,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:29:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:55,156 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 22:29:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:55,228 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 22:29:55,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:29:55,229 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 22:29:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:55,230 INFO L225 Difference]: With dead ends: 144 [2019-11-23 22:29:55,230 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:29:55,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:29:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 22:29:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 22:29:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 22:29:55,236 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 22:29:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:55,237 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 22:29:55,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:29:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 22:29:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 22:29:55,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:55,239 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:55,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:55,443 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 22:29:55,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:55,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488015950] [2019-11-23 22:29:55,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:55,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488015950] [2019-11-23 22:29:55,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237172092] [2019-11-23 22:29:55,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:55,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:29:55,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:55,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:29:55,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:29:55,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:55,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:29:55,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601526792] [2019-11-23 22:29:55,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:29:55,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:55,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:29:55,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:29:55,886 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 22:29:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:55,999 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 22:29:55,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:29:56,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 22:29:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:56,001 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:29:56,001 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 22:29:56,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:29:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 22:29:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 22:29:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:29:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 22:29:56,009 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 22:29:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:56,010 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 22:29:56,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:29:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 22:29:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:29:56,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:56,011 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:56,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:56,215 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:56,216 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 22:29:56,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:56,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996657983] [2019-11-23 22:29:56,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:29:56,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996657983] [2019-11-23 22:29:56,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936682606] [2019-11-23 22:29:56,430 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:56,507 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:56,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:56,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:29:56,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 22:29:56,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:56,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 22:29:56,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936017275] [2019-11-23 22:29:56,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:29:56,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:29:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:29:56,604 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 22:29:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:56,821 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 22:29:56,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:29:56,822 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 22:29:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:56,826 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:29:56,826 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:29:56,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:29:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:29:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 22:29:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:29:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 22:29:56,831 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 22:29:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:56,831 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 22:29:56,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:29:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 22:29:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:29:56,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:56,833 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:57,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:57,036 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:57,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:57,037 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 22:29:57,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:57,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533458701] [2019-11-23 22:29:57,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:29:57,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533458701] [2019-11-23 22:29:57,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031679328] [2019-11-23 22:29:57,264 INFO L92 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 [2019-11-23 22:29:57,969 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:29:57,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:57,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:29:57,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 22:29:58,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:58,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 22:29:58,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485853800] [2019-11-23 22:29:58,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:29:58,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:58,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:29:58,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:29:58,104 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 22:29:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:58,325 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 22:29:58,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:29:58,325 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 22:29:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:58,326 INFO L225 Difference]: With dead ends: 175 [2019-11-23 22:29:58,326 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 22:29:58,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:29:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 22:29:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 22:29:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 22:29:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 22:29:58,330 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 22:29:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:58,330 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 22:29:58,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:29:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 22:29:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 22:29:58,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:58,331 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:58,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:58,532 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:58,532 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 22:29:58,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:58,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283284404] [2019-11-23 22:29:58,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:29:58,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283284404] [2019-11-23 22:29:58,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486997399] [2019-11-23 22:29:58,757 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:59,386 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:29:59,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:59,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:29:59,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 22:29:59,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:59,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 22:29:59,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733272064] [2019-11-23 22:29:59,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:29:59,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:29:59,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:29:59,550 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 22:29:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:59,633 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 22:29:59,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:29:59,633 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 22:29:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:59,634 INFO L225 Difference]: With dead ends: 183 [2019-11-23 22:29:59,634 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:29:59,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:29:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:29:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 22:29:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 22:29:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 22:29:59,640 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 22:29:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:59,640 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 22:29:59,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:29:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 22:29:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 22:29:59,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:59,641 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:59,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:59,850 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 22:29:59,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:59,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263179715] [2019-11-23 22:29:59,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:00,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263179715] [2019-11-23 22:30:00,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516864205] [2019-11-23 22:30:00,100 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:00,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:30:00,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:00,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:00,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:30:00,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307983138] [2019-11-23 22:30:00,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:30:00,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:00,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:30:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:30:00,219 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 22:30:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:00,285 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 22:30:00,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:30:00,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 22:30:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:00,289 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:30:00,289 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:30:00,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:30:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:30:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 22:30:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:30:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 22:30:00,297 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 22:30:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:00,297 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 22:30:00,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:30:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 22:30:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:30:00,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:00,298 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:00,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:00,503 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 22:30:00,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:00,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488322540] [2019-11-23 22:30:00,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:00,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488322540] [2019-11-23 22:30:00,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45091504] [2019-11-23 22:30:00,779 INFO L92 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 [2019-11-23 22:30:00,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:00,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:00,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:30:00,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:00,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:00,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:30:00,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160513928] [2019-11-23 22:30:00,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:30:00,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:30:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:30:00,949 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 22:30:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:01,078 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 22:30:01,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:30:01,079 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 22:30:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:01,081 INFO L225 Difference]: With dead ends: 188 [2019-11-23 22:30:01,081 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:30:01,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:30:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:30:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 22:30:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:30:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 22:30:01,090 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 22:30:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:01,090 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 22:30:01,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:30:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 22:30:01,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:30:01,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:01,092 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:01,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:01,305 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:01,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:01,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 22:30:01,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:01,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911079271] [2019-11-23 22:30:01,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:01,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911079271] [2019-11-23 22:30:01,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277669081] [2019-11-23 22:30:01,594 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:01,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:30:01,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:01,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:30:01,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 22:30:02,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:02,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2019-11-23 22:30:02,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090464612] [2019-11-23 22:30:02,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:30:02,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:30:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=853, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:30:02,038 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 35 states. [2019-11-23 22:30:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:03,230 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2019-11-23 22:30:03,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:30:03,237 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 115 [2019-11-23 22:30:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:03,238 INFO L225 Difference]: With dead ends: 200 [2019-11-23 22:30:03,238 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:30:03,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 22:30:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:30:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-11-23 22:30:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 22:30:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 22:30:03,245 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2019-11-23 22:30:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:03,246 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 22:30:03,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:30:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 22:30:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 22:30:03,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:03,247 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:03,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:03,451 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 22 times [2019-11-23 22:30:03,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:03,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497369344] [2019-11-23 22:30:03,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:03,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497369344] [2019-11-23 22:30:03,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894106234] [2019-11-23 22:30:03,804 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:03,891 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:03,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:03,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:30:03,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:03,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:03,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:30:03,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236878743] [2019-11-23 22:30:03,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:30:03,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:30:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:30:03,932 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 27 states. [2019-11-23 22:30:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:04,020 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2019-11-23 22:30:04,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:30:04,021 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2019-11-23 22:30:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:04,022 INFO L225 Difference]: With dead ends: 206 [2019-11-23 22:30:04,022 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:30:04,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:30:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:30:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-11-23 22:30:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 22:30:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 22:30:04,028 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2019-11-23 22:30:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:04,028 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 22:30:04,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:30:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 22:30:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 22:30:04,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:04,029 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:04,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:04,233 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 23 times [2019-11-23 22:30:04,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:04,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013143501] [2019-11-23 22:30:04,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:04,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013143501] [2019-11-23 22:30:04,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351052172] [2019-11-23 22:30:04,627 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:08,046 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:30:08,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:08,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:30:08,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:08,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:08,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:30:08,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556263820] [2019-11-23 22:30:08,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:30:08,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:08,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:30:08,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:30:08,089 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2019-11-23 22:30:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:08,181 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2019-11-23 22:30:08,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:30:08,182 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2019-11-23 22:30:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:08,182 INFO L225 Difference]: With dead ends: 208 [2019-11-23 22:30:08,182 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:30:08,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:30:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:30:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-23 22:30:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 22:30:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2019-11-23 22:30:08,188 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2019-11-23 22:30:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:08,188 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2019-11-23 22:30:08,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:30:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2019-11-23 22:30:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 22:30:08,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:08,190 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:08,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:08,396 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 24 times [2019-11-23 22:30:08,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:08,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058561779] [2019-11-23 22:30:08,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:08,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058561779] [2019-11-23 22:30:08,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795951960] [2019-11-23 22:30:08,846 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:09,916 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 22:30:09,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:09,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:30:09,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2019-11-23 22:30:10,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:10,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-23 22:30:10,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088537724] [2019-11-23 22:30:10,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:30:10,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:10,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:30:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:10,059 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 36 states. [2019-11-23 22:30:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:10,226 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2019-11-23 22:30:10,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:30:10,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 129 [2019-11-23 22:30:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:10,229 INFO L225 Difference]: With dead ends: 213 [2019-11-23 22:30:10,229 INFO L226 Difference]: Without dead ends: 136 [2019-11-23 22:30:10,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-23 22:30:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2019-11-23 22:30:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 22:30:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 22:30:10,248 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 129 [2019-11-23 22:30:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:10,249 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 22:30:10,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:30:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 22:30:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 22:30:10,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:10,250 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:10,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:10,455 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:10,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:10,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2138537200, now seen corresponding path program 25 times [2019-11-23 22:30:10,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:10,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876598204] [2019-11-23 22:30:10,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:11,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876598204] [2019-11-23 22:30:11,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630213625] [2019-11-23 22:30:11,065 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:11,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:30:11,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:11,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:11,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 22:30:11,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857769123] [2019-11-23 22:30:11,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:30:11,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:11,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:30:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:30:11,237 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 30 states. [2019-11-23 22:30:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:11,377 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-11-23 22:30:11,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:30:11,378 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2019-11-23 22:30:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:11,379 INFO L225 Difference]: With dead ends: 216 [2019-11-23 22:30:11,380 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 22:30:11,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:30:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 22:30:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 22:30:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:30:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 22:30:11,388 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2019-11-23 22:30:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:11,389 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 22:30:11,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:30:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 22:30:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 22:30:11,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:11,391 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:11,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:11,595 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 26 times [2019-11-23 22:30:11,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:11,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317417855] [2019-11-23 22:30:11,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:12,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317417855] [2019-11-23 22:30:12,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993493003] [2019-11-23 22:30:12,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:12,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:12,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:12,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:30:12,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:12,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:12,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:30:12,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007200314] [2019-11-23 22:30:12,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:30:12,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:12,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:30:12,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:30:12,144 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2019-11-23 22:30:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:12,245 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2019-11-23 22:30:12,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:30:12,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2019-11-23 22:30:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:12,246 INFO L225 Difference]: With dead ends: 218 [2019-11-23 22:30:12,247 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 22:30:12,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:30:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 22:30:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 22:30:12,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 22:30:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 22:30:12,258 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2019-11-23 22:30:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:12,258 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 22:30:12,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:30:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 22:30:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 22:30:12,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:12,259 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:12,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:12,463 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 27 times [2019-11-23 22:30:12,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:12,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663148923] [2019-11-23 22:30:12,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:13,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663148923] [2019-11-23 22:30:13,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857478752] [2019-11-23 22:30:13,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:13,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:30:13,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:13,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:30:13,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2019-11-23 22:30:13,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:13,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-23 22:30:13,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809599931] [2019-11-23 22:30:13,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:30:13,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:30:13,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:30:13,422 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2019-11-23 22:30:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:13,745 INFO L93 Difference]: Finished difference Result 229 states and 240 transitions. [2019-11-23 22:30:13,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:30:13,745 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2019-11-23 22:30:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:13,747 INFO L225 Difference]: With dead ends: 229 [2019-11-23 22:30:13,747 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 22:30:13,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:30:13,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 22:30:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2019-11-23 22:30:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 22:30:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 22:30:13,754 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2019-11-23 22:30:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:13,754 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 22:30:13,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:30:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 22:30:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 22:30:13,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:13,756 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:13,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:13,958 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:13,959 INFO L82 PathProgramCache]: Analyzing trace with hash -870144824, now seen corresponding path program 28 times [2019-11-23 22:30:13,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:13,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926937511] [2019-11-23 22:30:13,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:30:14,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926937511] [2019-11-23 22:30:14,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273554630] [2019-11-23 22:30:14,521 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:14,667 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:14,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:14,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:30:14,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:30:14,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:14,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 22:30:14,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703316834] [2019-11-23 22:30:14,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:30:14,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:30:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:30:14,758 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 33 states. [2019-11-23 22:30:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:14,897 INFO L93 Difference]: Finished difference Result 234 states and 242 transitions. [2019-11-23 22:30:14,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:30:14,897 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 145 [2019-11-23 22:30:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:14,898 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:30:14,899 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 22:30:14,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:30:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 22:30:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 22:30:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 22:30:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 22:30:14,905 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 22:30:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:14,905 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 22:30:14,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:30:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 22:30:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 22:30:14,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:14,906 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:15,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:15,111 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash 922342406, now seen corresponding path program 29 times [2019-11-23 22:30:15,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:15,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478230388] [2019-11-23 22:30:15,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:30:15,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478230388] [2019-11-23 22:30:15,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527160301] [2019-11-23 22:30:15,778 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:18,031 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-23 22:30:18,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:18,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:30:18,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2019-11-23 22:30:18,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:18,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 22:30:18,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817877555] [2019-11-23 22:30:18,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:30:18,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:18,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:30:18,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:18,232 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 43 states. [2019-11-23 22:30:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:18,593 INFO L93 Difference]: Finished difference Result 245 states and 256 transitions. [2019-11-23 22:30:18,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:30:18,593 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2019-11-23 22:30:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:18,594 INFO L225 Difference]: With dead ends: 245 [2019-11-23 22:30:18,595 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 22:30:18,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 22:30:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 22:30:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 22:30:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 22:30:18,602 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 22:30:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:18,602 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 22:30:18,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:30:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 22:30:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 22:30:18,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:18,603 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:18,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:18,810 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash -907854910, now seen corresponding path program 30 times [2019-11-23 22:30:18,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:18,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773664234] [2019-11-23 22:30:18,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-23 22:30:19,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773664234] [2019-11-23 22:30:19,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243088731] [2019-11-23 22:30:19,325 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:20,551 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:30:20,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:20,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:30:20,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2019-11-23 22:30:20,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:20,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-11-23 22:30:20,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332565080] [2019-11-23 22:30:20,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:30:20,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:30:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:20,745 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 22:30:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:20,977 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2019-11-23 22:30:20,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:30:20,977 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 22:30:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:20,978 INFO L225 Difference]: With dead ends: 253 [2019-11-23 22:30:20,978 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 22:30:20,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 22:30:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 22:30:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:30:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 22:30:20,991 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 22:30:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:20,992 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 22:30:20,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:30:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 22:30:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:30:20,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:20,993 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:21,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:21,194 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:21,194 INFO L82 PathProgramCache]: Analyzing trace with hash -629222402, now seen corresponding path program 31 times [2019-11-23 22:30:21,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:21,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558469998] [2019-11-23 22:30:21,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:21,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558469998] [2019-11-23 22:30:21,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435622969] [2019-11-23 22:30:21,685 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:21,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:30:21,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:21,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:21,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:30:21,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578192099] [2019-11-23 22:30:21,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:30:21,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:30:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:21,829 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2019-11-23 22:30:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:21,932 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2019-11-23 22:30:21,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:30:21,933 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2019-11-23 22:30:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:21,934 INFO L225 Difference]: With dead ends: 256 [2019-11-23 22:30:21,934 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 22:30:21,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 22:30:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 22:30:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 22:30:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 22:30:21,940 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 22:30:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:21,941 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 22:30:21,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:30:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 22:30:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 22:30:21,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:21,942 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:22,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:22,146 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 32 times [2019-11-23 22:30:22,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:22,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519219079] [2019-11-23 22:30:22,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:23,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519219079] [2019-11-23 22:30:23,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624816657] [2019-11-23 22:30:23,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:23,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:23,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:23,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:30:23,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:23,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:23,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:30:23,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344305307] [2019-11-23 22:30:23,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:30:23,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:30:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:30:23,252 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 37 states. [2019-11-23 22:30:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:23,372 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 22:30:23,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:30:23,373 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2019-11-23 22:30:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:23,374 INFO L225 Difference]: With dead ends: 258 [2019-11-23 22:30:23,374 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 22:30:23,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:30:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 22:30:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 22:30:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 22:30:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 22:30:23,380 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 22:30:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:23,380 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 22:30:23,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:30:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 22:30:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 22:30:23,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:23,381 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:23,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:23,586 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1569164806, now seen corresponding path program 33 times [2019-11-23 22:30:23,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:23,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65513552] [2019-11-23 22:30:23,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:24,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65513552] [2019-11-23 22:30:24,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947324848] [2019-11-23 22:30:24,176 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:24,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:30:24,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:24,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:30:24,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1456 trivial. 0 not checked. [2019-11-23 22:30:24,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:24,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2019-11-23 22:30:24,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722756860] [2019-11-23 22:30:24,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:30:24,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:24,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:30:24,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:30:24,713 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 22:30:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:24,954 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2019-11-23 22:30:24,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:30:24,955 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 22:30:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:24,956 INFO L225 Difference]: With dead ends: 263 [2019-11-23 22:30:24,956 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 22:30:24,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:30:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 22:30:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2019-11-23 22:30:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-11-23 22:30:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2019-11-23 22:30:24,964 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 163 [2019-11-23 22:30:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:24,964 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2019-11-23 22:30:24,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:30:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2019-11-23 22:30:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-23 22:30:24,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:24,966 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:25,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:25,171 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -338674122, now seen corresponding path program 34 times [2019-11-23 22:30:25,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:25,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469075169] [2019-11-23 22:30:25,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:30:26,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469075169] [2019-11-23 22:30:26,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082955683] [2019-11-23 22:30:26,013 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:26,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:26,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:26,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:30:26,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-11-23 22:30:26,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:26,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2019-11-23 22:30:26,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755801644] [2019-11-23 22:30:26,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:30:26,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:30:26,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:30:26,368 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 49 states. [2019-11-23 22:30:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:26,703 INFO L93 Difference]: Finished difference Result 275 states and 286 transitions. [2019-11-23 22:30:26,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:30:26,704 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 167 [2019-11-23 22:30:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:26,705 INFO L225 Difference]: With dead ends: 275 [2019-11-23 22:30:26,706 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 22:30:26,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:30:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 22:30:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2019-11-23 22:30:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 22:30:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2019-11-23 22:30:26,714 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 167 [2019-11-23 22:30:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:26,714 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2019-11-23 22:30:26,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:30:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2019-11-23 22:30:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 22:30:26,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:26,715 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:26,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:26,919 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1357540110, now seen corresponding path program 35 times [2019-11-23 22:30:26,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:26,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41170422] [2019-11-23 22:30:26,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 22:30:27,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41170422] [2019-11-23 22:30:27,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968297506] [2019-11-23 22:30:27,676 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true