/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/eca-rers2012/Problem18_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:22:52,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:22:52,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:22:52,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:22:52,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:22:52,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:22:52,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:22:52,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:22:52,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:22:52,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:22:52,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:22:52,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:22:52,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:22:52,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:22:52,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:22:52,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:22:52,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:22:52,890 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 21:22:52,909 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:22:52,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:22:52,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:22:52,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:22:52,912 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:22:52,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:22:52,913 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:22:52,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:22:52,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:22:52,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:22:52,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:22:52,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:22:52,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:22:52,915 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:22:52,915 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:22:52,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:22:52,915 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:22:52,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:22:52,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:22:52,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:22:52,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:22:52,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:22:52,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:22:52,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:22:52,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:22:52,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:22:52,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:22:52,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:22:52,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:22:52,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:22:53,185 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:22:53,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:22:53,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:22:53,203 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:22:53,203 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:22:53,204 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-11-23 21:22:53,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873cee8f4/344993293d1f4f93b9155f70e13e8235/FLAG95820bf03 [2019-11-23 21:22:53,942 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:22:53,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-11-23 21:22:53,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873cee8f4/344993293d1f4f93b9155f70e13e8235/FLAG95820bf03 [2019-11-23 21:22:54,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873cee8f4/344993293d1f4f93b9155f70e13e8235 [2019-11-23 21:22:54,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:22:54,116 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:22:54,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:54,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:22:54,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:22:54,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:54" (1/1) ... [2019-11-23 21:22:54,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487d0c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:54, skipping insertion in model container [2019-11-23 21:22:54,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:54" (1/1) ... [2019-11-23 21:22:54,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:22:54,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:22:55,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:55,313 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:22:55,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:22:55,939 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:22:55,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55 WrapperNode [2019-11-23 21:22:55,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:22:55,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:55,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:22:55,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:22:55,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:22:56,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:22:56,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:22:56,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:22:56,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (1/1) ... [2019-11-23 21:22:56,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:22:56,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:22:56,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:22:56,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:22:56,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (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 21:22:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:22:56,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:23:00,408 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:23:00,408 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:23:00,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:00 BoogieIcfgContainer [2019-11-23 21:23:00,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:23:00,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:23:00,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:23:00,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:23:00,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:54" (1/3) ... [2019-11-23 21:23:00,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b7a359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:00, skipping insertion in model container [2019-11-23 21:23:00,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:55" (2/3) ... [2019-11-23 21:23:00,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b7a359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:00, skipping insertion in model container [2019-11-23 21:23:00,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:00" (3/3) ... [2019-11-23 21:23:00,419 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label23.c [2019-11-23 21:23:00,429 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:23:00,438 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:23:00,452 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:23:00,487 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:23:00,487 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:23:00,487 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:23:00,487 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:23:00,488 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:23:00,488 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:23:00,488 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:23:00,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:23:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:23:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 21:23:00,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:00,529 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, 1, 1, 1, 1] [2019-11-23 21:23:00,530 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times [2019-11-23 21:23:00,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:00,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586438958] [2019-11-23 21:23:00,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:00,842 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 21:23:00,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586438958] [2019-11-23 21:23:00,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:00,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:00,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757979713] [2019-11-23 21:23:00,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:00,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:00,869 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:07,956 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2019-11-23 21:23:07,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:07,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-23 21:23:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:08,002 INFO L225 Difference]: With dead ends: 2898 [2019-11-23 21:23:08,002 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:23:08,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 21:23:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:23:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:23:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:23:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3550 transitions. [2019-11-23 21:23:08,180 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3550 transitions. Word has length 55 [2019-11-23 21:23:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:08,182 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3550 transitions. [2019-11-23 21:23:08,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3550 transitions. [2019-11-23 21:23:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 21:23:08,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:08,195 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:08,195 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1820914196, now seen corresponding path program 1 times [2019-11-23 21:23:08,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:08,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657845647] [2019-11-23 21:23:08,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:08,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657845647] [2019-11-23 21:23:08,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:08,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:08,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988941124] [2019-11-23 21:23:08,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:08,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:08,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:08,461 INFO L87 Difference]: Start difference. First operand 2074 states and 3550 transitions. Second operand 4 states. [2019-11-23 21:23:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:14,689 INFO L93 Difference]: Finished difference Result 8286 states and 14192 transitions. [2019-11-23 21:23:14,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:14,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-23 21:23:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:14,720 INFO L225 Difference]: With dead ends: 8286 [2019-11-23 21:23:14,720 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:23:14,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:23:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:23:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 6214. [2019-11-23 21:23:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6214 states. [2019-11-23 21:23:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 9359 transitions. [2019-11-23 21:23:14,844 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 9359 transitions. Word has length 140 [2019-11-23 21:23:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:14,846 INFO L462 AbstractCegarLoop]: Abstraction has 6214 states and 9359 transitions. [2019-11-23 21:23:14,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 9359 transitions. [2019-11-23 21:23:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 21:23:14,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:14,855 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:14,855 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1006124935, now seen corresponding path program 1 times [2019-11-23 21:23:14,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:14,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64435218] [2019-11-23 21:23:14,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:15,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64435218] [2019-11-23 21:23:15,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:15,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:15,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473185157] [2019-11-23 21:23:15,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:15,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:15,060 INFO L87 Difference]: Start difference. First operand 6214 states and 9359 transitions. Second operand 4 states. [2019-11-23 21:23:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:21,321 INFO L93 Difference]: Finished difference Result 23468 states and 35521 transitions. [2019-11-23 21:23:21,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:21,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-11-23 21:23:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:21,396 INFO L225 Difference]: With dead ends: 23468 [2019-11-23 21:23:21,397 INFO L226 Difference]: Without dead ends: 17256 [2019-11-23 21:23:21,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:23:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2019-11-23 21:23:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 17254. [2019-11-23 21:23:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17254 states. [2019-11-23 21:23:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 22977 transitions. [2019-11-23 21:23:21,766 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 22977 transitions. Word has length 141 [2019-11-23 21:23:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:21,768 INFO L462 AbstractCegarLoop]: Abstraction has 17254 states and 22977 transitions. [2019-11-23 21:23:21,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 22977 transitions. [2019-11-23 21:23:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-23 21:23:21,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:21,780 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:21,780 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1800658230, now seen corresponding path program 1 times [2019-11-23 21:23:21,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:21,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428490344] [2019-11-23 21:23:21,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 21:23:21,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428490344] [2019-11-23 21:23:21,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:21,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:21,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789905729] [2019-11-23 21:23:21,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:21,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:21,931 INFO L87 Difference]: Start difference. First operand 17254 states and 22977 transitions. Second operand 4 states. [2019-11-23 21:23:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:26,355 INFO L93 Difference]: Finished difference Result 46236 states and 61910 transitions. [2019-11-23 21:23:26,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:26,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 206 [2019-11-23 21:23:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:26,444 INFO L225 Difference]: With dead ends: 46236 [2019-11-23 21:23:26,445 INFO L226 Difference]: Without dead ends: 29674 [2019-11-23 21:23:26,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:23:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29674 states. [2019-11-23 21:23:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29674 to 24844. [2019-11-23 21:23:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24844 states. [2019-11-23 21:23:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 29977 transitions. [2019-11-23 21:23:26,874 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 29977 transitions. Word has length 206 [2019-11-23 21:23:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:26,876 INFO L462 AbstractCegarLoop]: Abstraction has 24844 states and 29977 transitions. [2019-11-23 21:23:26,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 29977 transitions. [2019-11-23 21:23:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-11-23 21:23:26,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:26,883 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:26,884 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 755176210, now seen corresponding path program 1 times [2019-11-23 21:23:26,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:26,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100882507] [2019-11-23 21:23:26,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 21:23:27,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100882507] [2019-11-23 21:23:27,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:27,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:27,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340232630] [2019-11-23 21:23:27,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:27,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:27,548 INFO L87 Difference]: Start difference. First operand 24844 states and 29977 transitions. Second operand 5 states. [2019-11-23 21:23:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:34,104 INFO L93 Difference]: Finished difference Result 57966 states and 68982 transitions. [2019-11-23 21:23:34,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:34,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2019-11-23 21:23:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:34,156 INFO L225 Difference]: With dead ends: 57966 [2019-11-23 21:23:34,158 INFO L226 Difference]: Without dead ends: 33124 [2019-11-23 21:23:34,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2019-11-23 21:23:34,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 32434. [2019-11-23 21:23:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32434 states. [2019-11-23 21:23:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32434 states to 32434 states and 38071 transitions. [2019-11-23 21:23:35,650 INFO L78 Accepts]: Start accepts. Automaton has 32434 states and 38071 transitions. Word has length 324 [2019-11-23 21:23:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:35,650 INFO L462 AbstractCegarLoop]: Abstraction has 32434 states and 38071 transitions. [2019-11-23 21:23:35,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:23:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 32434 states and 38071 transitions. [2019-11-23 21:23:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2019-11-23 21:23:35,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:35,663 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:35,663 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash 370194618, now seen corresponding path program 1 times [2019-11-23 21:23:35,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:35,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887212568] [2019-11-23 21:23:35,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 468 proven. 3 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 21:23:36,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887212568] [2019-11-23 21:23:36,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093550126] [2019-11-23 21:23:36,468 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 21:23:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:36,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:36,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-11-23 21:23:36,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:36,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:36,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123824146] [2019-11-23 21:23:36,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:36,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:36,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:36,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:36,984 INFO L87 Difference]: Start difference. First operand 32434 states and 38071 transitions. Second operand 3 states. [2019-11-23 21:23:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:40,586 INFO L93 Difference]: Finished difference Result 74526 states and 88731 transitions. [2019-11-23 21:23:40,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:40,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2019-11-23 21:23:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:40,783 INFO L225 Difference]: With dead ends: 74526 [2019-11-23 21:23:40,783 INFO L226 Difference]: Without dead ends: 42784 [2019-11-23 21:23:40,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2019-11-23 21:23:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 42784. [2019-11-23 21:23:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42784 states. [2019-11-23 21:23:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 49768 transitions. [2019-11-23 21:23:41,494 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 49768 transitions. Word has length 506 [2019-11-23 21:23:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:41,495 INFO L462 AbstractCegarLoop]: Abstraction has 42784 states and 49768 transitions. [2019-11-23 21:23:41,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 49768 transitions. [2019-11-23 21:23:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2019-11-23 21:23:41,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:41,522 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:41,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:41,736 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash -706214611, now seen corresponding path program 1 times [2019-11-23 21:23:41,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:41,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466857380] [2019-11-23 21:23:41,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 494 proven. 3 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-11-23 21:23:42,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466857380] [2019-11-23 21:23:42,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301212127] [2019-11-23 21:23:42,797 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 21:23:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:42,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:42,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 563 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-11-23 21:23:43,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:43,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:43,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152230985] [2019-11-23 21:23:43,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:43,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:43,159 INFO L87 Difference]: Start difference. First operand 42784 states and 49768 transitions. Second operand 3 states. [2019-11-23 21:23:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:46,724 INFO L93 Difference]: Finished difference Result 84876 states and 98838 transitions. [2019-11-23 21:23:46,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:46,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 532 [2019-11-23 21:23:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:46,780 INFO L225 Difference]: With dead ends: 84876 [2019-11-23 21:23:46,780 INFO L226 Difference]: Without dead ends: 42784 [2019-11-23 21:23:46,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 531 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2019-11-23 21:23:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 42784. [2019-11-23 21:23:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42784 states. [2019-11-23 21:23:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 48393 transitions. [2019-11-23 21:23:47,323 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 48393 transitions. Word has length 532 [2019-11-23 21:23:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:47,324 INFO L462 AbstractCegarLoop]: Abstraction has 42784 states and 48393 transitions. [2019-11-23 21:23:47,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 48393 transitions. [2019-11-23 21:23:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2019-11-23 21:23:47,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:47,334 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:47,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:47,538 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:47,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1544390047, now seen corresponding path program 1 times [2019-11-23 21:23:47,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:47,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248014197] [2019-11-23 21:23:47,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 587 proven. 3 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-23 21:23:48,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248014197] [2019-11-23 21:23:48,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786639616] [2019-11-23 21:23:48,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:23:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:48,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:48,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 729 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 21:23:48,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:48,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:48,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038456227] [2019-11-23 21:23:48,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:48,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:48,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:48,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:48,579 INFO L87 Difference]: Start difference. First operand 42784 states and 48393 transitions. Second operand 3 states. [2019-11-23 21:23:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:52,121 INFO L93 Difference]: Finished difference Result 96606 states and 110770 transitions. [2019-11-23 21:23:52,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:52,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 575 [2019-11-23 21:23:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:52,173 INFO L225 Difference]: With dead ends: 96606 [2019-11-23 21:23:52,173 INFO L226 Difference]: Without dead ends: 50374 [2019-11-23 21:23:52,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 574 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50374 states. [2019-11-23 21:23:52,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50374 to 49684. [2019-11-23 21:23:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49684 states. [2019-11-23 21:23:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49684 states to 49684 states and 52511 transitions. [2019-11-23 21:23:52,986 INFO L78 Accepts]: Start accepts. Automaton has 49684 states and 52511 transitions. Word has length 575 [2019-11-23 21:23:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:52,987 INFO L462 AbstractCegarLoop]: Abstraction has 49684 states and 52511 transitions. [2019-11-23 21:23:52,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 49684 states and 52511 transitions. [2019-11-23 21:23:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2019-11-23 21:23:52,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:52,999 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:53,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:53,203 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1425716646, now seen corresponding path program 1 times [2019-11-23 21:23:53,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:53,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4808828] [2019-11-23 21:23:53,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 21:23:54,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4808828] [2019-11-23 21:23:54,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:54,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:54,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326714583] [2019-11-23 21:23:54,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:54,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:54,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:54,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:54,438 INFO L87 Difference]: Start difference. First operand 49684 states and 52511 transitions. Second operand 4 states. [2019-11-23 21:23:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:59,117 INFO L93 Difference]: Finished difference Result 120066 states and 127945 transitions. [2019-11-23 21:23:59,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:59,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1027 [2019-11-23 21:23:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:59,179 INFO L225 Difference]: With dead ends: 120066 [2019-11-23 21:23:59,179 INFO L226 Difference]: Without dead ends: 71074 [2019-11-23 21:23:59,423 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 21:23:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71074 states. [2019-11-23 21:23:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71074 to 58654. [2019-11-23 21:23:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58654 states. [2019-11-23 21:23:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58654 states to 58654 states and 61719 transitions. [2019-11-23 21:23:59,963 INFO L78 Accepts]: Start accepts. Automaton has 58654 states and 61719 transitions. Word has length 1027 [2019-11-23 21:23:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:59,964 INFO L462 AbstractCegarLoop]: Abstraction has 58654 states and 61719 transitions. [2019-11-23 21:23:59,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 58654 states and 61719 transitions. [2019-11-23 21:23:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2019-11-23 21:23:59,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:59,978 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:59,979 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1925497413, now seen corresponding path program 1 times [2019-11-23 21:23:59,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:59,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51008473] [2019-11-23 21:23:59,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2019-11-23 21:24:01,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51008473] [2019-11-23 21:24:01,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:01,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:01,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523073912] [2019-11-23 21:24:01,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:01,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:01,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:01,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:24:01,358 INFO L87 Difference]: Start difference. First operand 58654 states and 61719 transitions. Second operand 3 states. [2019-11-23 21:24:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:04,223 INFO L93 Difference]: Finished difference Result 131106 states and 138634 transitions. [2019-11-23 21:24:04,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:04,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1094 [2019-11-23 21:24:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:04,286 INFO L225 Difference]: With dead ends: 131106 [2019-11-23 21:24:04,286 INFO L226 Difference]: Without dead ends: 73144 [2019-11-23 21:24:04,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 4 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 21:24:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73144 states. [2019-11-23 21:24:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73144 to 67624. [2019-11-23 21:24:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67624 states. [2019-11-23 21:24:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67624 states to 67624 states and 71513 transitions. [2019-11-23 21:24:06,888 INFO L78 Accepts]: Start accepts. Automaton has 67624 states and 71513 transitions. Word has length 1094 [2019-11-23 21:24:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:06,889 INFO L462 AbstractCegarLoop]: Abstraction has 67624 states and 71513 transitions. [2019-11-23 21:24:06,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 67624 states and 71513 transitions. [2019-11-23 21:24:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1707 [2019-11-23 21:24:06,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:06,944 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:06,944 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1331844669, now seen corresponding path program 1 times [2019-11-23 21:24:06,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:06,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719473906] [2019-11-23 21:24:06,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2946 backedges. 1505 proven. 0 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2019-11-23 21:24:09,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719473906] [2019-11-23 21:24:09,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:09,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:09,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027968171] [2019-11-23 21:24:09,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:09,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:09,705 INFO L87 Difference]: Start difference. First operand 67624 states and 71513 transitions. Second operand 4 states.