/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/seq-pthread/cs_time_var_mutex.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:46:48,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:46:48,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:46:48,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:46:48,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:46:48,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:46:48,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:46:48,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:46:48,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:46:48,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:46:48,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:46:48,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:46:48,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:46:48,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:46:48,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:46:48,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:46:48,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:46:48,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:46:48,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:46:48,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:46:48,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:46:48,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:46:48,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:46:48,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:46:48,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:46:48,112 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 22:46:48,126 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:46:48,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:46:48,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:46:48,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:46:48,128 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:46:48,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:46:48,129 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:46:48,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:46:48,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:46:48,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:46:48,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:46:48,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:46:48,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:46:48,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:46:48,130 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:46:48,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:46:48,131 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:46:48,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:46:48,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:46:48,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:46:48,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:46:48,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:46:48,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:46:48,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:46:48,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:46:48,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:46:48,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:46:48,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:46:48,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:46:48,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:46:48,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:46:48,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:46:48,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:46:48,420 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:46:48,421 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:46:48,422 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_time_var_mutex.i [2019-11-23 22:46:48,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c6a6dfe/c196b0b3bfbf46bb92e421110c8e877c/FLAG79442252b [2019-11-23 22:46:49,073 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:46:49,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_time_var_mutex.i [2019-11-23 22:46:49,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c6a6dfe/c196b0b3bfbf46bb92e421110c8e877c/FLAG79442252b [2019-11-23 22:46:49,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c6a6dfe/c196b0b3bfbf46bb92e421110c8e877c [2019-11-23 22:46:49,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:46:49,357 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:46:49,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:46:49,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:46:49,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:46:49,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:46:49" (1/1) ... [2019-11-23 22:46:49,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657855ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:49, skipping insertion in model container [2019-11-23 22:46:49,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:46:49" (1/1) ... [2019-11-23 22:46:49,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:46:49,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:46:50,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:46:50,161 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:46:50,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:46:50,400 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:46:50,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50 WrapperNode [2019-11-23 22:46:50,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:46:50,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:46:50,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:46:50,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:46:50,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:46:50,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:46:50,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:46:50,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:46:50,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (1/1) ... [2019-11-23 22:46:50,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:46:50,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:46:50,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:46:50,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:46:50,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (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 22:46:50,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:46:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:46:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-23 22:46:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:46:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-23 22:46:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:46:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-23 22:46:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:46:50,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:46:50,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:46:54,772 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:46:54,772 INFO L284 CfgBuilder]: Removed 134 assume(true) statements. [2019-11-23 22:46:54,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:46:54 BoogieIcfgContainer [2019-11-23 22:46:54,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:46:54,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:46:54,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:46:54,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:46:54,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:46:49" (1/3) ... [2019-11-23 22:46:54,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4b3e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:46:54, skipping insertion in model container [2019-11-23 22:46:54,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:50" (2/3) ... [2019-11-23 22:46:54,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4b3e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:46:54, skipping insertion in model container [2019-11-23 22:46:54,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:46:54" (3/3) ... [2019-11-23 22:46:54,785 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_time_var_mutex.i [2019-11-23 22:46:54,796 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:46:54,808 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:46:54,819 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:46:54,855 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:46:54,855 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:46:54,855 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:46:54,855 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:46:54,856 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:46:54,856 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:46:54,856 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:46:54,856 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:46:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states. [2019-11-23 22:46:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:46:54,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:54,894 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:54,894 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1034843457, now seen corresponding path program 1 times [2019-11-23 22:46:54,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:54,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505976675] [2019-11-23 22:46:54,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:55,366 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 22:46:55,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505976675] [2019-11-23 22:46:55,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:55,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:55,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269314440] [2019-11-23 22:46:55,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:55,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:55,387 INFO L87 Difference]: Start difference. First operand 197 states. Second operand 3 states. [2019-11-23 22:46:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:55,531 INFO L93 Difference]: Finished difference Result 396 states and 630 transitions. [2019-11-23 22:46:55,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:55,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 22:46:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:55,558 INFO L225 Difference]: With dead ends: 396 [2019-11-23 22:46:55,559 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 22:46:55,570 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 22:46:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 22:46:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2019-11-23 22:46:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 22:46:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 306 transitions. [2019-11-23 22:46:55,635 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 306 transitions. Word has length 12 [2019-11-23 22:46:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:55,635 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 306 transitions. [2019-11-23 22:46:55,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 306 transitions. [2019-11-23 22:46:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:46:55,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:55,637 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:55,637 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash 284944619, now seen corresponding path program 1 times [2019-11-23 22:46:55,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:55,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930907788] [2019-11-23 22:46:55,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:55,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930907788] [2019-11-23 22:46:55,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:55,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:55,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882903128] [2019-11-23 22:46:55,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:55,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:55,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:55,758 INFO L87 Difference]: Start difference. First operand 194 states and 306 transitions. Second operand 3 states. [2019-11-23 22:46:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:55,802 INFO L93 Difference]: Finished difference Result 387 states and 612 transitions. [2019-11-23 22:46:55,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:55,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 22:46:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:55,806 INFO L225 Difference]: With dead ends: 387 [2019-11-23 22:46:55,806 INFO L226 Difference]: Without dead ends: 196 [2019-11-23 22:46:55,809 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 22:46:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-11-23 22:46:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2019-11-23 22:46:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-11-23 22:46:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 307 transitions. [2019-11-23 22:46:55,836 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 307 transitions. Word has length 15 [2019-11-23 22:46:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:55,836 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 307 transitions. [2019-11-23 22:46:55,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 307 transitions. [2019-11-23 22:46:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:46:55,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:55,837 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 22:46:55,838 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1465079187, now seen corresponding path program 1 times [2019-11-23 22:46:55,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:55,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431420697] [2019-11-23 22:46:55,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:46:56,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431420697] [2019-11-23 22:46:56,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:56,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:56,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4662252] [2019-11-23 22:46:56,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:46:56,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:56,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:46:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:46:56,486 INFO L87 Difference]: Start difference. First operand 195 states and 307 transitions. Second operand 4 states. [2019-11-23 22:46:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:56,587 INFO L93 Difference]: Finished difference Result 350 states and 552 transitions. [2019-11-23 22:46:56,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:46:56,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 22:46:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:56,590 INFO L225 Difference]: With dead ends: 350 [2019-11-23 22:46:56,591 INFO L226 Difference]: Without dead ends: 338 [2019-11-23 22:46:56,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:46:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-11-23 22:46:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2019-11-23 22:46:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2019-11-23 22:46:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 527 transitions. [2019-11-23 22:46:56,610 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 527 transitions. Word has length 17 [2019-11-23 22:46:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:56,611 INFO L462 AbstractCegarLoop]: Abstraction has 338 states and 527 transitions. [2019-11-23 22:46:56,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:46:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 527 transitions. [2019-11-23 22:46:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 22:46:56,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:56,614 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, 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 22:46:56,614 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:56,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2100222739, now seen corresponding path program 1 times [2019-11-23 22:46:56,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:56,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117750930] [2019-11-23 22:46:56,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:57,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117750930] [2019-11-23 22:46:57,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260583796] [2019-11-23 22:46:57,400 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 22:46:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:57,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:46:57,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:46:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:57,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:46:57,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:46:57,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830445686] [2019-11-23 22:46:57,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:46:57,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:57,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:46:57,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:46:57,693 INFO L87 Difference]: Start difference. First operand 338 states and 527 transitions. Second operand 5 states. [2019-11-23 22:46:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:57,739 INFO L93 Difference]: Finished difference Result 676 states and 1055 transitions. [2019-11-23 22:46:57,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:46:57,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-11-23 22:46:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:57,743 INFO L225 Difference]: With dead ends: 676 [2019-11-23 22:46:57,743 INFO L226 Difference]: Without dead ends: 341 [2019-11-23 22:46:57,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 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 22:46:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2019-11-23 22:46:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2019-11-23 22:46:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2019-11-23 22:46:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 529 transitions. [2019-11-23 22:46:57,781 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 529 transitions. Word has length 51 [2019-11-23 22:46:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:57,784 INFO L462 AbstractCegarLoop]: Abstraction has 340 states and 529 transitions. [2019-11-23 22:46:57,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:46:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 529 transitions. [2019-11-23 22:46:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:46:57,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:57,796 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, 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 22:46:58,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:58,003 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2077307537, now seen corresponding path program 2 times [2019-11-23 22:46:58,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:58,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883417914] [2019-11-23 22:46:58,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:46:58,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883417914] [2019-11-23 22:46:58,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:58,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:58,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516483080] [2019-11-23 22:46:58,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:58,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:58,591 INFO L87 Difference]: Start difference. First operand 340 states and 529 transitions. Second operand 3 states. [2019-11-23 22:46:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:58,778 INFO L93 Difference]: Finished difference Result 695 states and 1079 transitions. [2019-11-23 22:46:58,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:58,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-11-23 22:46:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:58,781 INFO L225 Difference]: With dead ends: 695 [2019-11-23 22:46:58,782 INFO L226 Difference]: Without dead ends: 384 [2019-11-23 22:46:58,782 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 22:46:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2019-11-23 22:46:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2019-11-23 22:46:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2019-11-23 22:46:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 589 transitions. [2019-11-23 22:46:58,798 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 589 transitions. Word has length 53 [2019-11-23 22:46:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:58,798 INFO L462 AbstractCegarLoop]: Abstraction has 384 states and 589 transitions. [2019-11-23 22:46:58,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 589 transitions. [2019-11-23 22:46:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:46:58,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:58,801 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, 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 22:46:58,801 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash 412221425, now seen corresponding path program 1 times [2019-11-23 22:46:58,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:58,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127794215] [2019-11-23 22:46:58,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:59,577 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-11-23 22:46:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:46:59,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127794215] [2019-11-23 22:46:59,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:59,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:46:59,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357843394] [2019-11-23 22:46:59,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:46:59,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:46:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:46:59,840 INFO L87 Difference]: Start difference. First operand 384 states and 589 transitions. Second operand 6 states. [2019-11-23 22:47:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:02,878 INFO L93 Difference]: Finished difference Result 592 states and 904 transitions. [2019-11-23 22:47:02,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:47:02,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2019-11-23 22:47:02,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:02,883 INFO L225 Difference]: With dead ends: 592 [2019-11-23 22:47:02,883 INFO L226 Difference]: Without dead ends: 364 [2019-11-23 22:47:02,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:47:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-11-23 22:47:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2019-11-23 22:47:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2019-11-23 22:47:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 558 transitions. [2019-11-23 22:47:02,896 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 558 transitions. Word has length 53 [2019-11-23 22:47:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:02,897 INFO L462 AbstractCegarLoop]: Abstraction has 364 states and 558 transitions. [2019-11-23 22:47:02,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:47:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 558 transitions. [2019-11-23 22:47:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:47:02,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:02,898 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, 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 22:47:02,899 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash -720646287, now seen corresponding path program 1 times [2019-11-23 22:47:02,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:02,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728761992] [2019-11-23 22:47:02,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:47:03,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728761992] [2019-11-23 22:47:03,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:03,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:47:03,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834715979] [2019-11-23 22:47:03,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:47:03,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:47:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:47:03,153 INFO L87 Difference]: Start difference. First operand 364 states and 558 transitions. Second operand 4 states. [2019-11-23 22:47:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:03,350 INFO L93 Difference]: Finished difference Result 719 states and 1107 transitions. [2019-11-23 22:47:03,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:47:03,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2019-11-23 22:47:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:03,353 INFO L225 Difference]: With dead ends: 719 [2019-11-23 22:47:03,353 INFO L226 Difference]: Without dead ends: 413 [2019-11-23 22:47:03,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:47:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-11-23 22:47:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2019-11-23 22:47:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-11-23 22:47:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 624 transitions. [2019-11-23 22:47:03,367 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 624 transitions. Word has length 53 [2019-11-23 22:47:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:03,367 INFO L462 AbstractCegarLoop]: Abstraction has 413 states and 624 transitions. [2019-11-23 22:47:03,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:47:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 624 transitions. [2019-11-23 22:47:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:47:03,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:03,368 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, 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 22:47:03,369 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1741714641, now seen corresponding path program 1 times [2019-11-23 22:47:03,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:03,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742076983] [2019-11-23 22:47:03,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:04,947 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-11-23 22:47:05,106 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-11-23 22:47:05,326 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-11-23 22:47:05,494 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2019-11-23 22:47:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:47:05,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742076983] [2019-11-23 22:47:05,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:05,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-23 22:47:05,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874389580] [2019-11-23 22:47:05,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:47:05,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:47:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:47:05,576 INFO L87 Difference]: Start difference. First operand 413 states and 624 transitions. Second operand 11 states. [2019-11-23 22:47:08,014 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2019-11-23 22:47:08,272 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2019-11-23 22:47:08,529 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2019-11-23 22:47:08,980 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2019-11-23 22:47:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:11,826 INFO L93 Difference]: Finished difference Result 801 states and 1225 transitions. [2019-11-23 22:47:11,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:47:11,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-11-23 22:47:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:11,832 INFO L225 Difference]: With dead ends: 801 [2019-11-23 22:47:11,832 INFO L226 Difference]: Without dead ends: 646 [2019-11-23 22:47:11,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:47:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-11-23 22:47:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 429. [2019-11-23 22:47:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2019-11-23 22:47:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 644 transitions. [2019-11-23 22:47:11,854 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 644 transitions. Word has length 53 [2019-11-23 22:47:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:11,855 INFO L462 AbstractCegarLoop]: Abstraction has 429 states and 644 transitions. [2019-11-23 22:47:11,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:47:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 644 transitions. [2019-11-23 22:47:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:47:11,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:11,856 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, 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 22:47:11,857 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash 864308913, now seen corresponding path program 1 times [2019-11-23 22:47:11,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:11,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423940553] [2019-11-23 22:47:11,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:12,945 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-11-23 22:47:13,097 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-11-23 22:47:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:47:13,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423940553] [2019-11-23 22:47:13,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:13,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-23 22:47:13,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967976592] [2019-11-23 22:47:13,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:47:13,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:13,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:47:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:47:13,183 INFO L87 Difference]: Start difference. First operand 429 states and 644 transitions. Second operand 10 states. [2019-11-23 22:47:15,701 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2019-11-23 22:47:15,975 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2019-11-23 22:47:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:17,482 INFO L93 Difference]: Finished difference Result 775 states and 1176 transitions. [2019-11-23 22:47:17,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:47:17,483 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-11-23 22:47:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:17,487 INFO L225 Difference]: With dead ends: 775 [2019-11-23 22:47:17,487 INFO L226 Difference]: Without dead ends: 620 [2019-11-23 22:47:17,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:47:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-23 22:47:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 418. [2019-11-23 22:47:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2019-11-23 22:47:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 629 transitions. [2019-11-23 22:47:17,507 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 629 transitions. Word has length 53 [2019-11-23 22:47:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:17,508 INFO L462 AbstractCegarLoop]: Abstraction has 418 states and 629 transitions. [2019-11-23 22:47:17,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:47:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 629 transitions. [2019-11-23 22:47:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:47:17,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:17,509 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, 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 22:47:17,509 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:17,510 INFO L82 PathProgramCache]: Analyzing trace with hash -430392234, now seen corresponding path program 1 times [2019-11-23 22:47:17,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:17,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704870861] [2019-11-23 22:47:17,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:47:18,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704870861] [2019-11-23 22:47:18,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:18,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:47:18,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358289440] [2019-11-23 22:47:18,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:47:18,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:18,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:47:18,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:18,430 INFO L87 Difference]: Start difference. First operand 418 states and 629 transitions. Second operand 6 states. [2019-11-23 22:47:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:21,499 INFO L93 Difference]: Finished difference Result 475 states and 715 transitions. [2019-11-23 22:47:21,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:47:21,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-11-23 22:47:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:21,502 INFO L225 Difference]: With dead ends: 475 [2019-11-23 22:47:21,502 INFO L226 Difference]: Without dead ends: 384 [2019-11-23 22:47:21,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:47:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2019-11-23 22:47:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2019-11-23 22:47:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2019-11-23 22:47:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 582 transitions. [2019-11-23 22:47:21,527 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 582 transitions. Word has length 56 [2019-11-23 22:47:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:21,527 INFO L462 AbstractCegarLoop]: Abstraction has 384 states and 582 transitions. [2019-11-23 22:47:21,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:47:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 582 transitions. [2019-11-23 22:47:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:47:21,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:21,528 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, 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 22:47:21,529 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -309899410, now seen corresponding path program 1 times [2019-11-23 22:47:21,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:21,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574125804] [2019-11-23 22:47:21,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:47:22,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574125804] [2019-11-23 22:47:22,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621377668] [2019-11-23 22:47:22,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:47:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:22,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:47:22,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:47:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:47:22,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:47:22,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:47:22,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385987912] [2019-11-23 22:47:22,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:47:22,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:22,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:47:22,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:22,998 INFO L87 Difference]: Start difference. First operand 384 states and 582 transitions. Second operand 6 states. [2019-11-23 22:47:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:23,055 INFO L93 Difference]: Finished difference Result 767 states and 1164 transitions. [2019-11-23 22:47:23,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:47:23,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-11-23 22:47:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:23,061 INFO L225 Difference]: With dead ends: 767 [2019-11-23 22:47:23,061 INFO L226 Difference]: Without dead ends: 386 [2019-11-23 22:47:23,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-11-23 22:47:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2019-11-23 22:47:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2019-11-23 22:47:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 584 transitions. [2019-11-23 22:47:23,089 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 584 transitions. Word has length 56 [2019-11-23 22:47:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:23,089 INFO L462 AbstractCegarLoop]: Abstraction has 386 states and 584 transitions. [2019-11-23 22:47:23,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:47:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 584 transitions. [2019-11-23 22:47:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:47:23,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:23,091 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1] [2019-11-23 22:47:23,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:23,298 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash -901208020, now seen corresponding path program 2 times [2019-11-23 22:47:23,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:23,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031310195] [2019-11-23 22:47:23,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:47:24,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031310195] [2019-11-23 22:47:24,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833130903] [2019-11-23 22:47:24,352 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 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 22:47:24,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:47:24,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:47:24,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:47:24,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:47:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:47:24,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:47:24,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2019-11-23 22:47:24,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857437165] [2019-11-23 22:47:24,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:47:24,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:47:24,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:47:24,655 INFO L87 Difference]: Start difference. First operand 386 states and 584 transitions. Second operand 7 states. [2019-11-23 22:47:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:27,058 INFO L93 Difference]: Finished difference Result 1942 states and 2872 transitions. [2019-11-23 22:47:27,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:47:27,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2019-11-23 22:47:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:27,073 INFO L225 Difference]: With dead ends: 1942 [2019-11-23 22:47:27,073 INFO L226 Difference]: Without dead ends: 1652 [2019-11-23 22:47:27,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:47:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2019-11-23 22:47:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1344. [2019-11-23 22:47:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1344 states. [2019-11-23 22:47:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1970 transitions. [2019-11-23 22:47:27,130 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1970 transitions. Word has length 58 [2019-11-23 22:47:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:27,131 INFO L462 AbstractCegarLoop]: Abstraction has 1344 states and 1970 transitions. [2019-11-23 22:47:27,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:47:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1970 transitions. [2019-11-23 22:47:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:47:27,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:27,133 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1] [2019-11-23 22:47:27,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:27,337 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1488014034, now seen corresponding path program 1 times [2019-11-23 22:47:27,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:27,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216508994] [2019-11-23 22:47:27,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:47:28,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216508994] [2019-11-23 22:47:28,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803289321] [2019-11-23 22:47:28,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:47:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:29,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:47:29,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:47:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:47:29,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:47:29,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:47:29,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327403483] [2019-11-23 22:47:29,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:47:29,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:47:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:47:29,182 INFO L87 Difference]: Start difference. First operand 1344 states and 1970 transitions. Second operand 5 states. [2019-11-23 22:47:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:29,375 INFO L93 Difference]: Finished difference Result 2693 states and 3946 transitions. [2019-11-23 22:47:29,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:47:29,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-11-23 22:47:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:29,381 INFO L225 Difference]: With dead ends: 2693 [2019-11-23 22:47:29,381 INFO L226 Difference]: Without dead ends: 1361 [2019-11-23 22:47:29,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 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 22:47:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2019-11-23 22:47:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1353. [2019-11-23 22:47:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2019-11-23 22:47:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1980 transitions. [2019-11-23 22:47:29,432 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1980 transitions. Word has length 58 [2019-11-23 22:47:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:29,432 INFO L462 AbstractCegarLoop]: Abstraction has 1353 states and 1980 transitions. [2019-11-23 22:47:29,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:47:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1980 transitions. [2019-11-23 22:47:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:47:29,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:29,439 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 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, 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 22:47:29,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:29,645 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1132452128, now seen corresponding path program 2 times [2019-11-23 22:47:29,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:29,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957812525] [2019-11-23 22:47:29,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:47:32,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957812525] [2019-11-23 22:47:32,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782606334] [2019-11-23 22:47:32,678 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 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 22:47:32,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:47:32,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:47:32,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:47:32,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:47:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:47:33,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:47:33,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2019-11-23 22:47:33,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187422241] [2019-11-23 22:47:33,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:47:33,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:33,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:47:33,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:47:33,008 INFO L87 Difference]: Start difference. First operand 1353 states and 1980 transitions. Second operand 7 states. [2019-11-23 22:47:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:36,047 INFO L93 Difference]: Finished difference Result 2299 states and 3299 transitions. [2019-11-23 22:47:36,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:47:36,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-11-23 22:47:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:36,052 INFO L225 Difference]: With dead ends: 2299 [2019-11-23 22:47:36,052 INFO L226 Difference]: Without dead ends: 914 [2019-11-23 22:47:36,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:47:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2019-11-23 22:47:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 829. [2019-11-23 22:47:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 829 states. [2019-11-23 22:47:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1077 transitions. [2019-11-23 22:47:36,090 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1077 transitions. Word has length 67 [2019-11-23 22:47:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:36,091 INFO L462 AbstractCegarLoop]: Abstraction has 829 states and 1077 transitions. [2019-11-23 22:47:36,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:47:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1077 transitions. [2019-11-23 22:47:36,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:47:36,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:36,092 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 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, 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 22:47:36,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:36,305 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash -612444640, now seen corresponding path program 1 times [2019-11-23 22:47:36,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:36,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679510805] [2019-11-23 22:47:36,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:47:38,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679510805] [2019-11-23 22:47:38,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992006423] [2019-11-23 22:47:38,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:47:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:38,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:47:38,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:47:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:47:38,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:47:38,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:47:38,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16053710] [2019-11-23 22:47:38,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:47:38,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:47:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:38,407 INFO L87 Difference]: Start difference. First operand 829 states and 1077 transitions. Second operand 6 states. [2019-11-23 22:47:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:38,526 INFO L93 Difference]: Finished difference Result 1646 states and 2141 transitions. [2019-11-23 22:47:38,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:47:38,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2019-11-23 22:47:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:38,531 INFO L225 Difference]: With dead ends: 1646 [2019-11-23 22:47:38,531 INFO L226 Difference]: Without dead ends: 838 [2019-11-23 22:47:38,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2019-11-23 22:47:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2019-11-23 22:47:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2019-11-23 22:47:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1087 transitions. [2019-11-23 22:47:38,570 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1087 transitions. Word has length 67 [2019-11-23 22:47:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:38,571 INFO L462 AbstractCegarLoop]: Abstraction has 838 states and 1087 transitions. [2019-11-23 22:47:38,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:47:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1087 transitions. [2019-11-23 22:47:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:47:38,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:38,572 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 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, 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 22:47:38,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:38,778 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1399663790, now seen corresponding path program 2 times [2019-11-23 22:47:38,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:38,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088749353] [2019-11-23 22:47:38,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:43,537 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 36 [2019-11-23 22:47:44,089 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 64 [2019-11-23 22:47:44,671 WARN L192 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 67 [2019-11-23 22:47:45,237 WARN L192 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 70 [2019-11-23 22:47:45,821 WARN L192 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 74 [2019-11-23 22:47:46,598 WARN L192 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 82 [2019-11-23 22:47:47,341 WARN L192 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 82 [2019-11-23 22:47:47,734 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 65 [2019-11-23 22:47:48,140 WARN L192 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 62 [2019-11-23 22:47:48,524 WARN L192 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 57 [2019-11-23 22:47:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:48,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088749353] [2019-11-23 22:47:48,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:48,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-23 22:47:48,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264543749] [2019-11-23 22:47:48,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:47:48,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:48,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:47:48,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:47:48,611 INFO L87 Difference]: Start difference. First operand 838 states and 1087 transitions. Second operand 12 states. [2019-11-23 22:47:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:52,415 INFO L93 Difference]: Finished difference Result 1265 states and 1639 transitions. [2019-11-23 22:47:52,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:47:52,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2019-11-23 22:47:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:52,420 INFO L225 Difference]: With dead ends: 1265 [2019-11-23 22:47:52,420 INFO L226 Difference]: Without dead ends: 1073 [2019-11-23 22:47:52,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:47:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2019-11-23 22:47:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 867. [2019-11-23 22:47:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2019-11-23 22:47:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1122 transitions. [2019-11-23 22:47:52,460 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1122 transitions. Word has length 76 [2019-11-23 22:47:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:52,460 INFO L462 AbstractCegarLoop]: Abstraction has 867 states and 1122 transitions. [2019-11-23 22:47:52,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:47:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1122 transitions. [2019-11-23 22:47:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:47:52,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:52,462 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 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, 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, 1] [2019-11-23 22:47:52,462 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:52,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1172153914, now seen corresponding path program 1 times [2019-11-23 22:47:52,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:52,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699756026] [2019-11-23 22:47:52,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:59,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699756026] [2019-11-23 22:47:59,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:59,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-23 22:47:59,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330513894] [2019-11-23 22:47:59,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:47:59,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:47:59,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:47:59,163 INFO L87 Difference]: Start difference. First operand 867 states and 1122 transitions. Second operand 10 states. [2019-11-23 22:48:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:48:02,499 INFO L93 Difference]: Finished difference Result 986 states and 1262 transitions. [2019-11-23 22:48:02,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:48:02,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2019-11-23 22:48:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:48:02,504 INFO L225 Difference]: With dead ends: 986 [2019-11-23 22:48:02,504 INFO L226 Difference]: Without dead ends: 982 [2019-11-23 22:48:02,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:48:02,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2019-11-23 22:48:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 896. [2019-11-23 22:48:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2019-11-23 22:48:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1157 transitions. [2019-11-23 22:48:02,550 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1157 transitions. Word has length 82 [2019-11-23 22:48:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:48:02,551 INFO L462 AbstractCegarLoop]: Abstraction has 896 states and 1157 transitions. [2019-11-23 22:48:02,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:48:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1157 transitions. [2019-11-23 22:48:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 22:48:02,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:48:02,553 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:48:02,553 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:48:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:48:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -157541050, now seen corresponding path program 1 times [2019-11-23 22:48:02,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:48:02,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163995653] [2019-11-23 22:48:02,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY