java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:45:22,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:45:22,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:45:22,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:45:22,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:45:22,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:45:22,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:45:22,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:45:22,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:45:22,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:45:22,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:45:22,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:45:22,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:45:22,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:45:22,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:45:22,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:45:22,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:45:22,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:45:22,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:45:22,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:45:22,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:45:22,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:45:22,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:45:22,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:45:22,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:45:22,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:45:22,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:45:22,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:45:22,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:45:22,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:45:22,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:45:22,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:45:22,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:45:22,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:45:22,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:45:22,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:45:22,900 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 [2019-10-14 23:45:22,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:45:22,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:45:22,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:45:22,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:45:22,936 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:45:22,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:45:22,939 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:45:22,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:45:22,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:45:22,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:45:22,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:45:22,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:45:22,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:45:22,940 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:45:22,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:45:22,941 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:45:22,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:45:22,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:45:22,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:45:22,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:45:22,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:45:22,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:45:22,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:45:22,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:45:22,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:45:22,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:45:22,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:45:22,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:45:22,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:45:23,187 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:45:23,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:45:23,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:45:23,208 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:45:23,208 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:45:23,209 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-14 23:45:23,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ea986c8/19d942a0ac6b4c68aae923aab83328b6/FLAG5673b66d0 [2019-10-14 23:45:23,815 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:45:23,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-14 23:45:23,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ea986c8/19d942a0ac6b4c68aae923aab83328b6/FLAG5673b66d0 [2019-10-14 23:45:24,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ea986c8/19d942a0ac6b4c68aae923aab83328b6 [2019-10-14 23:45:24,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:45:24,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:45:24,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:45:24,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:45:24,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:45:24,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:24,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea659fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24, skipping insertion in model container [2019-10-14 23:45:24,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:24,116 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:45:24,187 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:45:24,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:45:24,749 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:45:24,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:45:24,916 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:45:24,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24 WrapperNode [2019-10-14 23:45:24,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:45:24,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:45:24,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:45:24,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:45:24,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:24,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:24,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:24,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:24,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:24,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:25,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (1/1) ... [2019-10-14 23:45:25,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:45:25,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:45:25,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:45:25,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:45:25,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (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 [2019-10-14 23:45:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:45:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:45:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:45:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:45:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-14 23:45:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-14 23:45:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-14 23:45:25,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:45:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-14 23:45:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-14 23:45:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-14 23:45:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-14 23:45:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-14 23:45:25,095 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-14 23:45:25,096 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-14 23:45:25,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:45:25,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:45:25,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:45:26,571 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:45:26,571 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:45:26,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:45:26 BoogieIcfgContainer [2019-10-14 23:45:26,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:45:26,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:45:26,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:45:26,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:45:26,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:45:24" (1/3) ... [2019-10-14 23:45:26,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5721755e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:45:26, skipping insertion in model container [2019-10-14 23:45:26,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:45:24" (2/3) ... [2019-10-14 23:45:26,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5721755e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:45:26, skipping insertion in model container [2019-10-14 23:45:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:45:26" (3/3) ... [2019-10-14 23:45:26,586 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-14 23:45:26,595 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:45:26,623 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:45:26,634 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:45:26,663 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:45:26,664 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:45:26,664 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:45:26,664 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:45:26,664 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:45:26,664 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:45:26,665 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:45:26,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:45:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states. [2019-10-14 23:45:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:45:26,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:26,710 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:26,712 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:26,718 INFO L82 PathProgramCache]: Analyzing trace with hash 415390772, now seen corresponding path program 1 times [2019-10-14 23:45:26,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:26,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551372381] [2019-10-14 23:45:26,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:26,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:26,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:27,663 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:27,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551372381] [2019-10-14 23:45:27,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:27,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:27,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005487078] [2019-10-14 23:45:27,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:27,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:27,762 INFO L87 Difference]: Start difference. First operand 329 states. Second operand 4 states. [2019-10-14 23:45:28,112 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-14 23:45:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:29,776 INFO L93 Difference]: Finished difference Result 629 states and 1092 transitions. [2019-10-14 23:45:29,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:29,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-14 23:45:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:29,796 INFO L225 Difference]: With dead ends: 629 [2019-10-14 23:45:29,796 INFO L226 Difference]: Without dead ends: 514 [2019-10-14 23:45:29,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2019-10-14 23:45:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2019-10-14 23:45:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2019-10-14 23:45:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 761 transitions. [2019-10-14 23:45:29,892 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 761 transitions. Word has length 154 [2019-10-14 23:45:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:29,893 INFO L462 AbstractCegarLoop]: Abstraction has 512 states and 761 transitions. [2019-10-14 23:45:29,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 761 transitions. [2019-10-14 23:45:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:45:29,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:29,899 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:29,899 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1479062648, now seen corresponding path program 1 times [2019-10-14 23:45:29,900 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:29,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388512393] [2019-10-14 23:45:29,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:29,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:29,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:30,608 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:30,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388512393] [2019-10-14 23:45:30,669 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:30,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:45:30,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962564173] [2019-10-14 23:45:30,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:45:30,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:30,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:45:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:30,674 INFO L87 Difference]: Start difference. First operand 512 states and 761 transitions. Second operand 5 states. [2019-10-14 23:45:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:32,638 INFO L93 Difference]: Finished difference Result 1493 states and 2216 transitions. [2019-10-14 23:45:32,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:32,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-14 23:45:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:32,647 INFO L225 Difference]: With dead ends: 1493 [2019-10-14 23:45:32,647 INFO L226 Difference]: Without dead ends: 994 [2019-10-14 23:45:32,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2019-10-14 23:45:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 992. [2019-10-14 23:45:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2019-10-14 23:45:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1463 transitions. [2019-10-14 23:45:32,726 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1463 transitions. Word has length 154 [2019-10-14 23:45:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:32,727 INFO L462 AbstractCegarLoop]: Abstraction has 992 states and 1463 transitions. [2019-10-14 23:45:32,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:45:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1463 transitions. [2019-10-14 23:45:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-14 23:45:32,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:32,733 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:32,733 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash 203763094, now seen corresponding path program 1 times [2019-10-14 23:45:32,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:32,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804819627] [2019-10-14 23:45:32,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:32,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:32,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:33,099 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:33,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804819627] [2019-10-14 23:45:33,153 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:33,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:33,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381040366] [2019-10-14 23:45:33,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:33,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:33,155 INFO L87 Difference]: Start difference. First operand 992 states and 1463 transitions. Second operand 4 states. [2019-10-14 23:45:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:35,079 INFO L93 Difference]: Finished difference Result 2930 states and 4319 transitions. [2019-10-14 23:45:35,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:45:35,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-14 23:45:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:35,091 INFO L225 Difference]: With dead ends: 2930 [2019-10-14 23:45:35,092 INFO L226 Difference]: Without dead ends: 1970 [2019-10-14 23:45:35,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2019-10-14 23:45:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 994. [2019-10-14 23:45:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2019-10-14 23:45:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1465 transitions. [2019-10-14 23:45:35,177 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1465 transitions. Word has length 155 [2019-10-14 23:45:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:35,177 INFO L462 AbstractCegarLoop]: Abstraction has 994 states and 1465 transitions. [2019-10-14 23:45:35,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1465 transitions. [2019-10-14 23:45:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:45:35,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:35,181 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:35,181 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:35,182 INFO L82 PathProgramCache]: Analyzing trace with hash -691639607, now seen corresponding path program 1 times [2019-10-14 23:45:35,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:35,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699719020] [2019-10-14 23:45:35,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:35,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:35,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:35,617 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:35,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699719020] [2019-10-14 23:45:35,698 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:35,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:45:35,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726026573] [2019-10-14 23:45:35,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:45:35,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:35,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:45:35,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:35,702 INFO L87 Difference]: Start difference. First operand 994 states and 1465 transitions. Second operand 5 states. [2019-10-14 23:45:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:37,101 INFO L93 Difference]: Finished difference Result 1970 states and 2905 transitions. [2019-10-14 23:45:37,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:37,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-14 23:45:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:37,113 INFO L225 Difference]: With dead ends: 1970 [2019-10-14 23:45:37,113 INFO L226 Difference]: Without dead ends: 994 [2019-10-14 23:45:37,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2019-10-14 23:45:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 993. [2019-10-14 23:45:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2019-10-14 23:45:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1462 transitions. [2019-10-14 23:45:37,175 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1462 transitions. Word has length 156 [2019-10-14 23:45:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:37,175 INFO L462 AbstractCegarLoop]: Abstraction has 993 states and 1462 transitions. [2019-10-14 23:45:37,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:45:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1462 transitions. [2019-10-14 23:45:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:45:37,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:37,182 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:37,182 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2145460590, now seen corresponding path program 1 times [2019-10-14 23:45:37,183 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:37,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584908683] [2019-10-14 23:45:37,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:37,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:37,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:37,591 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:37,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584908683] [2019-10-14 23:45:37,632 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:37,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:45:37,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485019194] [2019-10-14 23:45:37,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:45:37,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:37,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:45:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:37,634 INFO L87 Difference]: Start difference. First operand 993 states and 1462 transitions. Second operand 5 states. [2019-10-14 23:45:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:39,016 INFO L93 Difference]: Finished difference Result 1973 states and 2907 transitions. [2019-10-14 23:45:39,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:39,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-14 23:45:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:39,022 INFO L225 Difference]: With dead ends: 1973 [2019-10-14 23:45:39,022 INFO L226 Difference]: Without dead ends: 991 [2019-10-14 23:45:39,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-10-14 23:45:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2019-10-14 23:45:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-10-14 23:45:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1458 transitions. [2019-10-14 23:45:39,062 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1458 transitions. Word has length 156 [2019-10-14 23:45:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:39,062 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1458 transitions. [2019-10-14 23:45:39,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:45:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1458 transitions. [2019-10-14 23:45:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:45:39,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:39,065 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:39,066 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1752535471, now seen corresponding path program 1 times [2019-10-14 23:45:39,066 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:39,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565728153] [2019-10-14 23:45:39,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:39,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:39,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:39,401 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:39,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565728153] [2019-10-14 23:45:39,475 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:39,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:39,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222656884] [2019-10-14 23:45:39,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:39,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:39,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:39,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:39,477 INFO L87 Difference]: Start difference. First operand 991 states and 1458 transitions. Second operand 4 states. [2019-10-14 23:45:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:41,736 INFO L93 Difference]: Finished difference Result 2257 states and 3335 transitions. [2019-10-14 23:45:41,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:45:41,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-14 23:45:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:41,745 INFO L225 Difference]: With dead ends: 2257 [2019-10-14 23:45:41,745 INFO L226 Difference]: Without dead ends: 1462 [2019-10-14 23:45:41,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2019-10-14 23:45:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1460. [2019-10-14 23:45:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2019-10-14 23:45:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2122 transitions. [2019-10-14 23:45:41,816 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2122 transitions. Word has length 156 [2019-10-14 23:45:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:41,817 INFO L462 AbstractCegarLoop]: Abstraction has 1460 states and 2122 transitions. [2019-10-14 23:45:41,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2122 transitions. [2019-10-14 23:45:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-14 23:45:41,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:41,821 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:41,821 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1902063682, now seen corresponding path program 1 times [2019-10-14 23:45:41,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:41,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325903028] [2019-10-14 23:45:41,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:41,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:41,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:42,127 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:42,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325903028] [2019-10-14 23:45:42,164 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:42,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:42,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951015368] [2019-10-14 23:45:42,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:42,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:42,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:42,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:42,166 INFO L87 Difference]: Start difference. First operand 1460 states and 2122 transitions. Second operand 4 states. [2019-10-14 23:45:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:43,691 INFO L93 Difference]: Finished difference Result 3179 states and 4753 transitions. [2019-10-14 23:45:43,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:45:43,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-14 23:45:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:43,701 INFO L225 Difference]: With dead ends: 3179 [2019-10-14 23:45:43,701 INFO L226 Difference]: Without dead ends: 1908 [2019-10-14 23:45:43,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2019-10-14 23:45:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1876. [2019-10-14 23:45:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2019-10-14 23:45:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2798 transitions. [2019-10-14 23:45:43,774 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2798 transitions. Word has length 157 [2019-10-14 23:45:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:43,774 INFO L462 AbstractCegarLoop]: Abstraction has 1876 states and 2798 transitions. [2019-10-14 23:45:43,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2798 transitions. [2019-10-14 23:45:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:45:43,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:43,778 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:43,778 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1819575298, now seen corresponding path program 1 times [2019-10-14 23:45:43,779 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:43,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906126959] [2019-10-14 23:45:43,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:43,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:43,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:44,178 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:44,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906126959] [2019-10-14 23:45:44,227 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:44,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:45:44,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511298871] [2019-10-14 23:45:44,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:45:44,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:44,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:45:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:44,234 INFO L87 Difference]: Start difference. First operand 1876 states and 2798 transitions. Second operand 5 states. [2019-10-14 23:45:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:46,362 INFO L93 Difference]: Finished difference Result 4810 states and 7177 transitions. [2019-10-14 23:45:46,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:46,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-14 23:45:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:46,373 INFO L225 Difference]: With dead ends: 4810 [2019-10-14 23:45:46,373 INFO L226 Difference]: Without dead ends: 2965 [2019-10-14 23:45:46,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2019-10-14 23:45:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2019-10-14 23:45:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2019-10-14 23:45:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4385 transitions. [2019-10-14 23:45:46,499 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4385 transitions. Word has length 160 [2019-10-14 23:45:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:46,500 INFO L462 AbstractCegarLoop]: Abstraction has 2963 states and 4385 transitions. [2019-10-14 23:45:46,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:45:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4385 transitions. [2019-10-14 23:45:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 23:45:46,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:46,508 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:46,508 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash -489223043, now seen corresponding path program 1 times [2019-10-14 23:45:46,509 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:46,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125887501] [2019-10-14 23:45:46,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:46,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:46,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:46,928 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:46,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125887501] [2019-10-14 23:45:46,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:46,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:46,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650420514] [2019-10-14 23:45:46,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:46,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:46,981 INFO L87 Difference]: Start difference. First operand 2963 states and 4385 transitions. Second operand 4 states. [2019-10-14 23:45:49,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:49,049 INFO L93 Difference]: Finished difference Result 7148 states and 10640 transitions. [2019-10-14 23:45:49,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:45:49,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-14 23:45:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:49,066 INFO L225 Difference]: With dead ends: 7148 [2019-10-14 23:45:49,067 INFO L226 Difference]: Without dead ends: 4544 [2019-10-14 23:45:49,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4544 states. [2019-10-14 23:45:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4544 to 4542. [2019-10-14 23:45:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2019-10-14 23:45:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 6645 transitions. [2019-10-14 23:45:49,253 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 6645 transitions. Word has length 162 [2019-10-14 23:45:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:49,254 INFO L462 AbstractCegarLoop]: Abstraction has 4542 states and 6645 transitions. [2019-10-14 23:45:49,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 6645 transitions. [2019-10-14 23:45:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 23:45:49,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:49,261 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:49,261 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash -598358062, now seen corresponding path program 1 times [2019-10-14 23:45:49,262 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:49,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512688517] [2019-10-14 23:45:49,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:49,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:49,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:49,594 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:49,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512688517] [2019-10-14 23:45:49,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:49,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:49,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541372976] [2019-10-14 23:45:49,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:49,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:49,630 INFO L87 Difference]: Start difference. First operand 4542 states and 6645 transitions. Second operand 4 states. [2019-10-14 23:45:49,870 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-10-14 23:45:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:51,470 INFO L93 Difference]: Finished difference Result 12098 states and 17966 transitions. [2019-10-14 23:45:51,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:51,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-14 23:45:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:51,499 INFO L225 Difference]: With dead ends: 12098 [2019-10-14 23:45:51,499 INFO L226 Difference]: Without dead ends: 8790 [2019-10-14 23:45:51,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8790 states. [2019-10-14 23:45:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8790 to 8788. [2019-10-14 23:45:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8788 states. [2019-10-14 23:45:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 12891 transitions. [2019-10-14 23:45:51,815 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 12891 transitions. Word has length 166 [2019-10-14 23:45:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:51,815 INFO L462 AbstractCegarLoop]: Abstraction has 8788 states and 12891 transitions. [2019-10-14 23:45:51,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 12891 transitions. [2019-10-14 23:45:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 23:45:51,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:51,827 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:51,827 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash 875092589, now seen corresponding path program 1 times [2019-10-14 23:45:51,828 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:51,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302014835] [2019-10-14 23:45:51,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:51,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:51,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:52,200 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:52,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302014835] [2019-10-14 23:45:52,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:52,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 23:45:52,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002457656] [2019-10-14 23:45:52,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:45:52,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:52,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:45:52,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:45:52,269 INFO L87 Difference]: Start difference. First operand 8788 states and 12891 transitions. Second operand 9 states. [2019-10-14 23:45:52,603 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:45:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:55,068 INFO L93 Difference]: Finished difference Result 29662 states and 44875 transitions. [2019-10-14 23:45:55,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:45:55,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 166 [2019-10-14 23:45:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:55,116 INFO L225 Difference]: With dead ends: 29662 [2019-10-14 23:45:55,116 INFO L226 Difference]: Without dead ends: 21434 [2019-10-14 23:45:55,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:45:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21434 states. [2019-10-14 23:45:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21434 to 12552. [2019-10-14 23:45:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12552 states. [2019-10-14 23:45:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12552 states to 12552 states and 18471 transitions. [2019-10-14 23:45:55,820 INFO L78 Accepts]: Start accepts. Automaton has 12552 states and 18471 transitions. Word has length 166 [2019-10-14 23:45:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:55,821 INFO L462 AbstractCegarLoop]: Abstraction has 12552 states and 18471 transitions. [2019-10-14 23:45:55,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:45:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 12552 states and 18471 transitions. [2019-10-14 23:45:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 23:45:55,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:55,830 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:55,830 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:55,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2101346563, now seen corresponding path program 1 times [2019-10-14 23:45:55,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:55,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293861591] [2019-10-14 23:45:55,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:55,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:55,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:56,199 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-14 23:45:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:56,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293861591] [2019-10-14 23:45:56,248 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:56,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:45:56,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315936692] [2019-10-14 23:45:56,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:45:56,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:56,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:45:56,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:56,249 INFO L87 Difference]: Start difference. First operand 12552 states and 18471 transitions. Second operand 5 states. [2019-10-14 23:45:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:58,946 INFO L93 Difference]: Finished difference Result 36416 states and 53423 transitions. [2019-10-14 23:45:58,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:58,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2019-10-14 23:45:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:58,981 INFO L225 Difference]: With dead ends: 36416 [2019-10-14 23:45:58,981 INFO L226 Difference]: Without dead ends: 23907 [2019-10-14 23:45:59,003 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23907 states.