/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:37:54,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:37:54,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:37:54,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:37:54,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:37:55,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:37:55,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:37:55,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:37:55,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:37:55,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:37:55,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:37:55,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:37:55,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:37:55,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:37:55,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:37:55,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:37:55,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:37:55,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:37:55,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:37:55,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:37:55,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:37:55,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:37:55,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:37:55,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:37:55,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:37:55,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:37:55,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:37:55,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:37:55,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:37:55,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:37:55,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:37:55,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:37:55,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:37:55,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:37:55,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:37:55,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:37:55,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:37:55,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:37:55,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:37:55,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:37:55,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:37:55,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:37:55,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:37:55,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:37:55,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:37:55,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:37:55,105 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:37:55,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:37:55,105 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:37:55,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:37:55,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:37:55,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:37:55,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:37:55,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:37:55,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:37:55,107 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:37:55,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:37:55,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:37:55,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:37:55,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:37:55,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:37:55,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:37:55,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:37:55,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:37:55,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:37:55,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:37:55,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:37:55,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:37:55,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:37:55,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:37:55,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:37:55,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:37:55,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:37:55,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:37:55,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:37:55,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:37:55,462 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:37:55,463 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-12 19:37:55,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd8743732/0eccfdf106f54908a59f12081aefcd67/FLAGb9bfcb3dd [2020-10-12 19:37:56,007 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:37:56,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-12 19:37:56,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd8743732/0eccfdf106f54908a59f12081aefcd67/FLAGb9bfcb3dd [2020-10-12 19:37:56,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd8743732/0eccfdf106f54908a59f12081aefcd67 [2020-10-12 19:37:56,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:37:56,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:37:56,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:37:56,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:37:56,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:37:56,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:56,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56, skipping insertion in model container [2020-10-12 19:37:56,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:56,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:37:56,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:37:56,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:37:56,726 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:37:56,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:37:56,962 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:37:56,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56 WrapperNode [2020-10-12 19:37:56,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:37:56,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:37:56,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:37:56,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:37:56,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:56,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:56,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:56,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:57,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:57,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:57,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... [2020-10-12 19:37:57,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:37:57,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:37:57,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:37:57,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:37:57,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 19:37:57,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:37:57,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:37:57,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:37:57,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:37:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:37:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:37:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:37:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:37:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:37:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:37:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:37:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:37:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:37:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:37:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:37:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:37:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 19:37:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:37:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:37:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:37:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:37:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:37:57,708 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:37:57,708 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:37:57,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:37:57 BoogieIcfgContainer [2020-10-12 19:37:57,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:37:57,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:37:57,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:37:57,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:37:57,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:37:56" (1/3) ... [2020-10-12 19:37:57,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f31f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:37:57, skipping insertion in model container [2020-10-12 19:37:57,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:56" (2/3) ... [2020-10-12 19:37:57,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f31f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:37:57, skipping insertion in model container [2020-10-12 19:37:57,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:37:57" (3/3) ... [2020-10-12 19:37:57,723 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-12 19:37:57,734 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:37:57,742 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:37:57,756 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:37:57,783 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:37:57,783 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:37:57,783 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:37:57,783 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:37:57,784 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:37:57,784 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:37:57,784 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:37:57,784 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:37:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2020-10-12 19:37:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:37:57,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:57,818 INFO L422 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] [2020-10-12 19:37:57,818 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1959120292, now seen corresponding path program 1 times [2020-10-12 19:37:57,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:57,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424582108] [2020-10-12 19:37:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:58,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:59,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:03,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:03,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:38:03,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:38:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 19:38:03,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:03,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:38:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:38:03,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 19:38:03,620 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:03,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:03,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:03,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:03,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 19:38:03,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:38:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:03,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424582108] [2020-10-12 19:38:03,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:03,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:03,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960609504] [2020-10-12 19:38:03,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:03,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:03,731 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 8 states. [2020-10-12 19:38:04,020 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 19:38:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:04,953 INFO L93 Difference]: Finished difference Result 742 states and 1170 transitions. [2020-10-12 19:38:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:04,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-12 19:38:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:04,976 INFO L225 Difference]: With dead ends: 742 [2020-10-12 19:38:04,976 INFO L226 Difference]: Without dead ends: 638 [2020-10-12 19:38:04,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-12 19:38:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 156. [2020-10-12 19:38:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 19:38:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 225 transitions. [2020-10-12 19:38:05,054 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 225 transitions. Word has length 63 [2020-10-12 19:38:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:05,055 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 225 transitions. [2020-10-12 19:38:05,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 225 transitions. [2020-10-12 19:38:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:38:05,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:05,058 INFO L422 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] [2020-10-12 19:38:05,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:38:05,059 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1285622915, now seen corresponding path program 1 times [2020-10-12 19:38:05,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:05,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651136147] [2020-10-12 19:38:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:08,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:10,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:10,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:38:10,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:38:10,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:38:10,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 19:38:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:38:10,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:10,352 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:10,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:10,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:10,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:10,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:10,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:10,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:38:10,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:10,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:10,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:10,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651136147] [2020-10-12 19:38:10,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:10,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:10,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141717646] [2020-10-12 19:38:10,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:10,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:10,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:10,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:10,423 INFO L87 Difference]: Start difference. First operand 156 states and 225 transitions. Second operand 8 states. [2020-10-12 19:38:10,668 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:38:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:11,424 INFO L93 Difference]: Finished difference Result 1022 states and 1590 transitions. [2020-10-12 19:38:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:11,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:38:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:11,431 INFO L225 Difference]: With dead ends: 1022 [2020-10-12 19:38:11,431 INFO L226 Difference]: Without dead ends: 904 [2020-10-12 19:38:11,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-12 19:38:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 326. [2020-10-12 19:38:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-12 19:38:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 495 transitions. [2020-10-12 19:38:11,493 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 495 transitions. Word has length 65 [2020-10-12 19:38:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:11,493 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 495 transitions. [2020-10-12 19:38:11,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 495 transitions. [2020-10-12 19:38:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:38:11,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:11,502 INFO L422 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] [2020-10-12 19:38:11,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:38:11,502 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:11,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1583607403, now seen corresponding path program 1 times [2020-10-12 19:38:11,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:11,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434973809] [2020-10-12 19:38:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:11,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:11,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:11,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:11,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:13,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:13,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:16,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:16,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:38:16,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:38:16,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:38:16,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:16,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:38:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:38:16,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:16,756 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:16,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:16,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:16,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:16,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:16,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:16,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:38:16,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:16,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:16,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434973809] [2020-10-12 19:38:16,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:16,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:16,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613194238] [2020-10-12 19:38:16,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:16,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:16,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:16,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:16,796 INFO L87 Difference]: Start difference. First operand 326 states and 495 transitions. Second operand 8 states. [2020-10-12 19:38:17,047 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:38:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:17,694 INFO L93 Difference]: Finished difference Result 1244 states and 1936 transitions. [2020-10-12 19:38:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:17,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:38:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:17,703 INFO L225 Difference]: With dead ends: 1244 [2020-10-12 19:38:17,704 INFO L226 Difference]: Without dead ends: 1072 [2020-10-12 19:38:17,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-10-12 19:38:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 500. [2020-10-12 19:38:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-12 19:38:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 772 transitions. [2020-10-12 19:38:17,772 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 772 transitions. Word has length 65 [2020-10-12 19:38:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:17,772 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 772 transitions. [2020-10-12 19:38:17,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 772 transitions. [2020-10-12 19:38:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:38:17,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:17,775 INFO L422 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] [2020-10-12 19:38:17,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:38:17,780 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash 625733375, now seen corresponding path program 1 times [2020-10-12 19:38:17,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:17,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005539665] [2020-10-12 19:38:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:17,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:17,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:18,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:18,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:21,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:21,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:38:21,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:38:21,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3648 [2020-10-12 19:38:21,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:21,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:38:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 19:38:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:38:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:21,672 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:21,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:21,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:21,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:21,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:21,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:38:21,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:21,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:21,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:21,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:21,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:21,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005539665] [2020-10-12 19:38:21,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:21,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:38:21,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098214319] [2020-10-12 19:38:21,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:38:21,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:21,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:38:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:38:21,701 INFO L87 Difference]: Start difference. First operand 500 states and 772 transitions. Second operand 5 states. [2020-10-12 19:38:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:22,292 INFO L93 Difference]: Finished difference Result 966 states and 1503 transitions. [2020-10-12 19:38:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:38:22,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-12 19:38:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:22,298 INFO L225 Difference]: With dead ends: 966 [2020-10-12 19:38:22,298 INFO L226 Difference]: Without dead ends: 964 [2020-10-12 19:38:22,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:38:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-10-12 19:38:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 514. [2020-10-12 19:38:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-12 19:38:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 786 transitions. [2020-10-12 19:38:22,350 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 786 transitions. Word has length 65 [2020-10-12 19:38:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:22,351 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 786 transitions. [2020-10-12 19:38:22,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:38:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 786 transitions. [2020-10-12 19:38:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:38:22,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:22,352 INFO L422 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] [2020-10-12 19:38:22,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:38:22,353 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash 645782718, now seen corresponding path program 1 times [2020-10-12 19:38:22,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:22,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064376004] [2020-10-12 19:38:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:22,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:22,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:22,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:22,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:22,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:26,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:38:26,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:38:26,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3752 [2020-10-12 19:38:26,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:26,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:26,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:38:26,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:38:26,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:38:26,375 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:26,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:26,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:26,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:26,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:26,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:38:26,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:26,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:26,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:26,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:26,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:26,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064376004] [2020-10-12 19:38:26,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:26,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:26,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097372077] [2020-10-12 19:38:26,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:26,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:26,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:26,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:26,417 INFO L87 Difference]: Start difference. First operand 514 states and 786 transitions. Second operand 8 states. [2020-10-12 19:38:26,637 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-12 19:38:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:27,365 INFO L93 Difference]: Finished difference Result 1530 states and 2368 transitions. [2020-10-12 19:38:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:27,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:38:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:27,373 INFO L225 Difference]: With dead ends: 1530 [2020-10-12 19:38:27,373 INFO L226 Difference]: Without dead ends: 1054 [2020-10-12 19:38:27,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2020-10-12 19:38:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 514. [2020-10-12 19:38:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-12 19:38:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 782 transitions. [2020-10-12 19:38:27,455 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 782 transitions. Word has length 65 [2020-10-12 19:38:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:27,459 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 782 transitions. [2020-10-12 19:38:27,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 782 transitions. [2020-10-12 19:38:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:38:27,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:27,461 INFO L422 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] [2020-10-12 19:38:27,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:38:27,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1607352625, now seen corresponding path program 1 times [2020-10-12 19:38:27,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:27,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459950900] [2020-10-12 19:38:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:27,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:27,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:27,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:32,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:32,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:38:32,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:38:32,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:38:32,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:32,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:32,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:38:32,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:38:32,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:32,669 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:32,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:32,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:32,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:32,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:32,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:38:32,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:38:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:32,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459950900] [2020-10-12 19:38:32,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:32,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:32,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826439559] [2020-10-12 19:38:32,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:32,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:32,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:32,727 INFO L87 Difference]: Start difference. First operand 514 states and 782 transitions. Second operand 8 states. [2020-10-12 19:38:32,994 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:38:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:34,176 INFO L93 Difference]: Finished difference Result 1459 states and 2247 transitions. [2020-10-12 19:38:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:34,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:38:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:34,187 INFO L225 Difference]: With dead ends: 1459 [2020-10-12 19:38:34,188 INFO L226 Difference]: Without dead ends: 1283 [2020-10-12 19:38:34,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2020-10-12 19:38:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 634. [2020-10-12 19:38:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-10-12 19:38:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 970 transitions. [2020-10-12 19:38:34,276 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 970 transitions. Word has length 65 [2020-10-12 19:38:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:34,277 INFO L479 AbstractCegarLoop]: Abstraction has 634 states and 970 transitions. [2020-10-12 19:38:34,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 970 transitions. [2020-10-12 19:38:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:38:34,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:34,278 INFO L422 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] [2020-10-12 19:38:34,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:38:34,279 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1979878519, now seen corresponding path program 1 times [2020-10-12 19:38:34,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:34,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822487474] [2020-10-12 19:38:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:34,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:34,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:34,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:34,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:34,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:39,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:39,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:38:39,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:38:39,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:38:39,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:38:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:38:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:39,524 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:39,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:39,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:39,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:39,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:39,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:38:39,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:39,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:39,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:39,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:39,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822487474] [2020-10-12 19:38:39,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:39,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:39,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542253773] [2020-10-12 19:38:39,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:39,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:39,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:39,559 INFO L87 Difference]: Start difference. First operand 634 states and 970 transitions. Second operand 8 states. [2020-10-12 19:38:39,726 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:38:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:40,486 INFO L93 Difference]: Finished difference Result 1602 states and 2470 transitions. [2020-10-12 19:38:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:40,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:38:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:40,494 INFO L225 Difference]: With dead ends: 1602 [2020-10-12 19:38:40,494 INFO L226 Difference]: Without dead ends: 1426 [2020-10-12 19:38:40,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2020-10-12 19:38:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 754. [2020-10-12 19:38:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-10-12 19:38:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1158 transitions. [2020-10-12 19:38:40,597 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1158 transitions. Word has length 65 [2020-10-12 19:38:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:40,598 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1158 transitions. [2020-10-12 19:38:40,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1158 transitions. [2020-10-12 19:38:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:38:40,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:40,599 INFO L422 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] [2020-10-12 19:38:40,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:38:40,600 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:40,600 INFO L82 PathProgramCache]: Analyzing trace with hash 402730947, now seen corresponding path program 1 times [2020-10-12 19:38:40,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:40,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462254397] [2020-10-12 19:38:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:40,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:40,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:40,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:40,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:40,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:41,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:45,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:45,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:38:45,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:38:45,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:38:45,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:45,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:38:45,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:38:45,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:45,821 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:45,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:45,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:45,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:45,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:45,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:38:45,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:45,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:45,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:45,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:45,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:45,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462254397] [2020-10-12 19:38:45,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:45,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:45,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641292271] [2020-10-12 19:38:45,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:45,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:45,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:45,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:45,860 INFO L87 Difference]: Start difference. First operand 754 states and 1158 transitions. Second operand 8 states. [2020-10-12 19:38:46,034 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-12 19:38:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:46,905 INFO L93 Difference]: Finished difference Result 1755 states and 2709 transitions. [2020-10-12 19:38:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:46,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 19:38:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:46,914 INFO L225 Difference]: With dead ends: 1755 [2020-10-12 19:38:46,914 INFO L226 Difference]: Without dead ends: 1579 [2020-10-12 19:38:46,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-10-12 19:38:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 874. [2020-10-12 19:38:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-12 19:38:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1346 transitions. [2020-10-12 19:38:47,018 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1346 transitions. Word has length 65 [2020-10-12 19:38:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:47,019 INFO L479 AbstractCegarLoop]: Abstraction has 874 states and 1346 transitions. [2020-10-12 19:38:47,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1346 transitions. [2020-10-12 19:38:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:38:47,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:47,020 INFO L422 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] [2020-10-12 19:38:47,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:38:47,021 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2067482087, now seen corresponding path program 1 times [2020-10-12 19:38:47,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:47,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148854313] [2020-10-12 19:38:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:47,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:47,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:38:47,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:38:47,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-12 19:38:47,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:38:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:38:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:38:47,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:48,170 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:48,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:48,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:48,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:48,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:48,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:38:48,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:48,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:48,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148854313] [2020-10-12 19:38:48,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:48,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:38:48,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084021207] [2020-10-12 19:38:48,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:38:48,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:38:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:38:48,207 INFO L87 Difference]: Start difference. First operand 874 states and 1346 transitions. Second operand 5 states. [2020-10-12 19:38:48,365 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:38:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:49,082 INFO L93 Difference]: Finished difference Result 3124 states and 4867 transitions. [2020-10-12 19:38:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:38:49,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:38:49,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:49,093 INFO L225 Difference]: With dead ends: 3124 [2020-10-12 19:38:49,094 INFO L226 Difference]: Without dead ends: 2288 [2020-10-12 19:38:49,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:38:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2020-10-12 19:38:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2284. [2020-10-12 19:38:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2020-10-12 19:38:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3520 transitions. [2020-10-12 19:38:49,346 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3520 transitions. Word has length 66 [2020-10-12 19:38:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:49,346 INFO L479 AbstractCegarLoop]: Abstraction has 2284 states and 3520 transitions. [2020-10-12 19:38:49,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:38:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3520 transitions. [2020-10-12 19:38:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:38:49,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:49,348 INFO L422 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] [2020-10-12 19:38:49,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:38:49,349 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1635572434, now seen corresponding path program 1 times [2020-10-12 19:38:49,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:49,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780318131] [2020-10-12 19:38:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:51,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:51,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:54,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:54,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:38:54,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:38:54,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 19:38:54,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 19:38:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:38:54,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:54,555 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:54,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:54,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:54,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:54,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:54,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:38:54,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:54,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780318131] [2020-10-12 19:38:54,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:54,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:54,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894822937] [2020-10-12 19:38:54,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:54,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:54,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:54,582 INFO L87 Difference]: Start difference. First operand 2284 states and 3520 transitions. Second operand 8 states. [2020-10-12 19:38:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:55,828 INFO L93 Difference]: Finished difference Result 4841 states and 7419 transitions. [2020-10-12 19:38:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 19:38:55,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-12 19:38:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:55,852 INFO L225 Difference]: With dead ends: 4841 [2020-10-12 19:38:55,853 INFO L226 Difference]: Without dead ends: 4510 [2020-10-12 19:38:55,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:38:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2020-10-12 19:38:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 2351. [2020-10-12 19:38:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2351 states. [2020-10-12 19:38:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 3627 transitions. [2020-10-12 19:38:56,092 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 3627 transitions. Word has length 67 [2020-10-12 19:38:56,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:56,093 INFO L479 AbstractCegarLoop]: Abstraction has 2351 states and 3627 transitions. [2020-10-12 19:38:56,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:56,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 3627 transitions. [2020-10-12 19:38:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:38:56,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:56,095 INFO L422 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] [2020-10-12 19:38:56,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:38:56,095 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash 593817687, now seen corresponding path program 1 times [2020-10-12 19:38:56,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:56,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440327293] [2020-10-12 19:38:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:56,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:56,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:56,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:58,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:58,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:38:58,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:38:58,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2683 [2020-10-12 19:38:58,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:38:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:38:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:38:58,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:58,960 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:38:58,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:58,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:58,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:58,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:58,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:58,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:38:58,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:38:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:38:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:58,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440327293] [2020-10-12 19:38:58,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:58,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:38:58,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803615674] [2020-10-12 19:38:58,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:38:58,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:38:58,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:38:58,997 INFO L87 Difference]: Start difference. First operand 2351 states and 3627 transitions. Second operand 7 states. [2020-10-12 19:38:59,165 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:38:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:59,942 INFO L93 Difference]: Finished difference Result 4337 states and 6736 transitions. [2020-10-12 19:38:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:38:59,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:38:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:59,957 INFO L225 Difference]: With dead ends: 4337 [2020-10-12 19:38:59,958 INFO L226 Difference]: Without dead ends: 3719 [2020-10-12 19:38:59,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:38:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2020-10-12 19:39:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 2289. [2020-10-12 19:39:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-10-12 19:39:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3528 transitions. [2020-10-12 19:39:00,255 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3528 transitions. Word has length 67 [2020-10-12 19:39:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:00,255 INFO L479 AbstractCegarLoop]: Abstraction has 2289 states and 3528 transitions. [2020-10-12 19:39:00,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:39:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3528 transitions. [2020-10-12 19:39:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:39:00,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:00,257 INFO L422 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] [2020-10-12 19:39:00,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:39:00,257 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1993533551, now seen corresponding path program 1 times [2020-10-12 19:39:00,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:00,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445107588] [2020-10-12 19:39:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:00,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:02,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:02,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:39:02,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:39:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2379 [2020-10-12 19:39:02,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:39:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:39:02,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:02,871 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:02,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:02,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:02,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:02,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:02,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:39:02,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:02,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445107588] [2020-10-12 19:39:02,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:02,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:39:02,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989507637] [2020-10-12 19:39:02,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:39:02,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:39:02,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:39:02,907 INFO L87 Difference]: Start difference. First operand 2289 states and 3528 transitions. Second operand 7 states. [2020-10-12 19:39:03,063 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:39:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:04,088 INFO L93 Difference]: Finished difference Result 6724 states and 10321 transitions. [2020-10-12 19:39:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:39:04,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:39:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:04,111 INFO L225 Difference]: With dead ends: 6724 [2020-10-12 19:39:04,112 INFO L226 Difference]: Without dead ends: 4478 [2020-10-12 19:39:04,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:39:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2020-10-12 19:39:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2472. [2020-10-12 19:39:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2020-10-12 19:39:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3807 transitions. [2020-10-12 19:39:04,465 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3807 transitions. Word has length 67 [2020-10-12 19:39:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:04,465 INFO L479 AbstractCegarLoop]: Abstraction has 2472 states and 3807 transitions. [2020-10-12 19:39:04,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:39:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3807 transitions. [2020-10-12 19:39:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:39:04,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:04,467 INFO L422 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] [2020-10-12 19:39:04,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:39:04,467 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash 649211689, now seen corresponding path program 1 times [2020-10-12 19:39:04,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:04,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375941583] [2020-10-12 19:39:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:04,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:04,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:04,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:04,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:04,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:06,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:06,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:39:06,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:39:06,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2393 [2020-10-12 19:39:06,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:39:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:39:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:07,081 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:07,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:07,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:07,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:07,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375941583] [2020-10-12 19:39:07,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:07,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:39:07,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446754260] [2020-10-12 19:39:07,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:39:07,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:39:07,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:39:07,114 INFO L87 Difference]: Start difference. First operand 2472 states and 3807 transitions. Second operand 7 states. [2020-10-12 19:39:07,265 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:39:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:08,301 INFO L93 Difference]: Finished difference Result 7116 states and 10931 transitions. [2020-10-12 19:39:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:39:08,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:39:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:08,313 INFO L225 Difference]: With dead ends: 7116 [2020-10-12 19:39:08,314 INFO L226 Difference]: Without dead ends: 4814 [2020-10-12 19:39:08,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:39:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2020-10-12 19:39:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 2448. [2020-10-12 19:39:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2448 states. [2020-10-12 19:39:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3757 transitions. [2020-10-12 19:39:08,640 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3757 transitions. Word has length 67 [2020-10-12 19:39:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:08,641 INFO L479 AbstractCegarLoop]: Abstraction has 2448 states and 3757 transitions. [2020-10-12 19:39:08,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:39:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3757 transitions. [2020-10-12 19:39:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:39:08,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:08,642 INFO L422 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] [2020-10-12 19:39:08,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:39:08,642 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -865886877, now seen corresponding path program 1 times [2020-10-12 19:39:08,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:08,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069863529] [2020-10-12 19:39:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:08,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:08,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:08,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:08,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:09,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:11,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:11,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:39:11,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:39:11,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2472 [2020-10-12 19:39:11,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:39:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:39:11,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:11,337 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:11,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:11,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:11,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:11,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:11,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:11,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:39:11,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:11,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:11,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:11,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:11,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:11,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069863529] [2020-10-12 19:39:11,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:11,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:39:11,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491151331] [2020-10-12 19:39:11,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:39:11,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:11,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:39:11,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:39:11,386 INFO L87 Difference]: Start difference. First operand 2448 states and 3757 transitions. Second operand 7 states. [2020-10-12 19:39:11,542 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:39:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:12,531 INFO L93 Difference]: Finished difference Result 7508 states and 11545 transitions. [2020-10-12 19:39:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:39:12,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:39:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:12,543 INFO L225 Difference]: With dead ends: 7508 [2020-10-12 19:39:12,544 INFO L226 Difference]: Without dead ends: 5158 [2020-10-12 19:39:12,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:39:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2020-10-12 19:39:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 2392. [2020-10-12 19:39:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2392 states. [2020-10-12 19:39:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3673 transitions. [2020-10-12 19:39:12,878 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3673 transitions. Word has length 67 [2020-10-12 19:39:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:12,878 INFO L479 AbstractCegarLoop]: Abstraction has 2392 states and 3673 transitions. [2020-10-12 19:39:12,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:39:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3673 transitions. [2020-10-12 19:39:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:39:12,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:12,879 INFO L422 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] [2020-10-12 19:39:12,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:39:12,880 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash -395758819, now seen corresponding path program 1 times [2020-10-12 19:39:12,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:12,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67763313] [2020-10-12 19:39:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:12,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:12,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:12,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:15,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:15,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:39:15,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:39:15,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2756 [2020-10-12 19:39:15,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:39:15,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:15,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:39:15,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:15,815 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:15,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:15,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:15,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:15,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:15,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:39:15,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:15,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:15,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:15,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67763313] [2020-10-12 19:39:15,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:15,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:39:15,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450760412] [2020-10-12 19:39:15,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:39:15,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:39:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:39:15,847 INFO L87 Difference]: Start difference. First operand 2392 states and 3673 transitions. Second operand 7 states. [2020-10-12 19:39:16,000 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 19:39:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:17,079 INFO L93 Difference]: Finished difference Result 7844 states and 12091 transitions. [2020-10-12 19:39:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:39:17,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:39:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:17,091 INFO L225 Difference]: With dead ends: 7844 [2020-10-12 19:39:17,091 INFO L226 Difference]: Without dead ends: 5514 [2020-10-12 19:39:17,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:39:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2020-10-12 19:39:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 2348. [2020-10-12 19:39:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2348 states. [2020-10-12 19:39:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 3609 transitions. [2020-10-12 19:39:17,479 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 3609 transitions. Word has length 67 [2020-10-12 19:39:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:17,479 INFO L479 AbstractCegarLoop]: Abstraction has 2348 states and 3609 transitions. [2020-10-12 19:39:17,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:39:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 3609 transitions. [2020-10-12 19:39:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:39:17,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:17,481 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:17,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:39:17,482 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1734217254, now seen corresponding path program 1 times [2020-10-12 19:39:17,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:17,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477552167] [2020-10-12 19:39:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:17,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:17,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:17,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:17,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:17,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:17,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:19,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:22,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:22,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:39:22,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:39:22,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:39:22,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:22,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:22,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 19:39:22,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:39:22,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:22,640 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:22,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:22,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:22,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:22,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:39:22,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:39:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:22,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:39:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 19:39:22,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477552167] [2020-10-12 19:39:22,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:22,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:39:22,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940278294] [2020-10-12 19:39:22,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:39:22,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:22,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:39:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:39:22,667 INFO L87 Difference]: Start difference. First operand 2348 states and 3609 transitions. Second operand 4 states. [2020-10-12 19:39:22,826 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:39:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:23,735 INFO L93 Difference]: Finished difference Result 6542 states and 10083 transitions. [2020-10-12 19:39:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:39:23,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-12 19:39:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:23,742 INFO L225 Difference]: With dead ends: 6542 [2020-10-12 19:39:23,742 INFO L226 Difference]: Without dead ends: 4270 [2020-10-12 19:39:23,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:39:23,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2020-10-12 19:39:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4268. [2020-10-12 19:39:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4268 states. [2020-10-12 19:39:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 6524 transitions. [2020-10-12 19:39:24,288 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 6524 transitions. Word has length 93 [2020-10-12 19:39:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:24,289 INFO L479 AbstractCegarLoop]: Abstraction has 4268 states and 6524 transitions. [2020-10-12 19:39:24,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:39:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 6524 transitions. [2020-10-12 19:39:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 19:39:24,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:24,292 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:39:24,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:39:24,292 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1956266972, now seen corresponding path program 1 times [2020-10-12 19:39:24,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:24,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145480647] [2020-10-12 19:39:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:24,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:24,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:24,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:24,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:24,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:26,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:26,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:29,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:29,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 19:39:29,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:39:29,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 19:39:29,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:29,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:39:29,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:29,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:39:29,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:39:29,486 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:29,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:29,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:29,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:29,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:29,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 19:39:29,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:29,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:29,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 19:39:29,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145480647] [2020-10-12 19:39:29,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:29,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:39:29,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427513966] [2020-10-12 19:39:29,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:39:29,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:39:29,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:39:29,545 INFO L87 Difference]: Start difference. First operand 4268 states and 6524 transitions. Second operand 6 states. [2020-10-12 19:39:29,716 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:39:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:30,611 INFO L93 Difference]: Finished difference Result 8464 states and 12961 transitions. [2020-10-12 19:39:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:39:30,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-12 19:39:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:30,617 INFO L225 Difference]: With dead ends: 8464 [2020-10-12 19:39:30,618 INFO L226 Difference]: Without dead ends: 4268 [2020-10-12 19:39:30,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:39:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2020-10-12 19:39:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4268. [2020-10-12 19:39:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4268 states. [2020-10-12 19:39:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 6482 transitions. [2020-10-12 19:39:31,133 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 6482 transitions. Word has length 94 [2020-10-12 19:39:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:31,133 INFO L479 AbstractCegarLoop]: Abstraction has 4268 states and 6482 transitions. [2020-10-12 19:39:31,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:39:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 6482 transitions. [2020-10-12 19:39:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 19:39:31,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:31,137 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:39:31,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:39:31,137 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:31,138 INFO L82 PathProgramCache]: Analyzing trace with hash -592273663, now seen corresponding path program 1 times [2020-10-12 19:39:31,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:31,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99613763] [2020-10-12 19:39:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:31,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:31,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:36,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:36,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 19:39:36,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:39:36,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:39:36,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:39:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:39:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:36,428 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:36,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:36,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:36,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:36,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:36,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:36,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:39:36,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:36,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:36,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99613763] [2020-10-12 19:39:36,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:39:36,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:39:36,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449068324] [2020-10-12 19:39:36,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:39:36,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:36,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:39:36,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:39:36,465 INFO L87 Difference]: Start difference. First operand 4268 states and 6482 transitions. Second operand 11 states. [2020-10-12 19:39:36,659 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 19:39:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:42,339 INFO L93 Difference]: Finished difference Result 32688 states and 49178 transitions. [2020-10-12 19:39:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:39:42,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-10-12 19:39:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:42,372 INFO L225 Difference]: With dead ends: 32688 [2020-10-12 19:39:42,373 INFO L226 Difference]: Without dead ends: 28518 [2020-10-12 19:39:42,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:39:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28518 states. [2020-10-12 19:39:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28518 to 11304. [2020-10-12 19:39:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11304 states. [2020-10-12 19:39:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11304 states to 11304 states and 17077 transitions. [2020-10-12 19:39:44,085 INFO L78 Accepts]: Start accepts. Automaton has 11304 states and 17077 transitions. Word has length 94 [2020-10-12 19:39:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:44,085 INFO L479 AbstractCegarLoop]: Abstraction has 11304 states and 17077 transitions. [2020-10-12 19:39:44,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:39:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 11304 states and 17077 transitions. [2020-10-12 19:39:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:39:44,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:44,090 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:39:44,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:39:44,091 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:44,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1122470528, now seen corresponding path program 1 times [2020-10-12 19:39:44,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:44,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394996196] [2020-10-12 19:39:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:44,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:44,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:44,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:44,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:44,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:44,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:46,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:46,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:49,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:49,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:39:49,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:39:49,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:39:49,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:39:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:39:49,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:39:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:49,443 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:39:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:49,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:49,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:49,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:49,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:49,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:39:49,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:39:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:39:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:49,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394996196] [2020-10-12 19:39:49,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:39:49,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:39:49,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296013392] [2020-10-12 19:39:49,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:39:49,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:39:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:39:49,474 INFO L87 Difference]: Start difference. First operand 11304 states and 17077 transitions. Second operand 10 states. [2020-10-12 19:39:49,646 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:39:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:55,751 INFO L93 Difference]: Finished difference Result 32755 states and 49211 transitions. [2020-10-12 19:39:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:39:55,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2020-10-12 19:39:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:55,780 INFO L225 Difference]: With dead ends: 32755 [2020-10-12 19:39:55,780 INFO L226 Difference]: Without dead ends: 28598 [2020-10-12 19:39:55,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-10-12 19:39:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28598 states. [2020-10-12 19:39:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28598 to 11624. [2020-10-12 19:39:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11624 states. [2020-10-12 19:39:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11624 states to 11624 states and 17557 transitions. [2020-10-12 19:39:57,670 INFO L78 Accepts]: Start accepts. Automaton has 11624 states and 17557 transitions. Word has length 95 [2020-10-12 19:39:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:57,670 INFO L479 AbstractCegarLoop]: Abstraction has 11624 states and 17557 transitions. [2020-10-12 19:39:57,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:39:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11624 states and 17557 transitions. [2020-10-12 19:39:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:39:57,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:57,676 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:39:57,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:39:57,677 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:57,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1771463102, now seen corresponding path program 1 times [2020-10-12 19:39:57,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:57,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211711307] [2020-10-12 19:39:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:57,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:57,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:57,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:57,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:57,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:57,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:58,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:58,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:03,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:03,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:40:03,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:40:03,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5578 [2020-10-12 19:40:03,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:40:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:03,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:40:03,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:03,436 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:40:03,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:03,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:03,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:03,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:03,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:03,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:40:03,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:03,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 19:40:03,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211711307] [2020-10-12 19:40:03,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:03,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:40:03,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945327825] [2020-10-12 19:40:03,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:40:03,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:40:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:40:03,469 INFO L87 Difference]: Start difference. First operand 11624 states and 17557 transitions. Second operand 6 states. [2020-10-12 19:40:03,634 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 19:40:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:07,278 INFO L93 Difference]: Finished difference Result 34448 states and 51993 transitions. [2020-10-12 19:40:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:40:07,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-12 19:40:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:07,304 INFO L225 Difference]: With dead ends: 34448 [2020-10-12 19:40:07,304 INFO L226 Difference]: Without dead ends: 22926 [2020-10-12 19:40:07,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22926 states. [2020-10-12 19:40:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22926 to 22924. [2020-10-12 19:40:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22924 states. [2020-10-12 19:40:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22924 states to 22924 states and 34358 transitions. [2020-10-12 19:40:10,624 INFO L78 Accepts]: Start accepts. Automaton has 22924 states and 34358 transitions. Word has length 95 [2020-10-12 19:40:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:10,625 INFO L479 AbstractCegarLoop]: Abstraction has 22924 states and 34358 transitions. [2020-10-12 19:40:10,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:40:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 22924 states and 34358 transitions. [2020-10-12 19:40:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:40:10,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:10,633 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:40:10,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:40:10,633 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:10,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1858687933, now seen corresponding path program 1 times [2020-10-12 19:40:10,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:10,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198305863] [2020-10-12 19:40:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:10,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:11,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:12,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:13,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:15,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:15,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:40:15,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:40:15,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:40:15,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:15,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:40:15,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:40:15,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 19:40:15,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:15,887 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:40:15,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:15,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:15,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:15,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:15,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198305863] [2020-10-12 19:40:15,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:40:15,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:40:15,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704683451] [2020-10-12 19:40:15,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:40:15,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:15,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:40:15,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:40:15,918 INFO L87 Difference]: Start difference. First operand 22924 states and 34358 transitions. Second operand 6 states. [2020-10-12 19:40:16,065 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:40:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:20,937 INFO L93 Difference]: Finished difference Result 39414 states and 59442 transitions. [2020-10-12 19:40:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:40:20,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-12 19:40:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:20,975 INFO L225 Difference]: With dead ends: 39414 [2020-10-12 19:40:20,975 INFO L226 Difference]: Without dead ends: 30946 [2020-10-12 19:40:20,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:40:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30946 states. [2020-10-12 19:40:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30946 to 30940. [2020-10-12 19:40:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30940 states. [2020-10-12 19:40:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30940 states to 30940 states and 46378 transitions. [2020-10-12 19:40:25,685 INFO L78 Accepts]: Start accepts. Automaton has 30940 states and 46378 transitions. Word has length 95 [2020-10-12 19:40:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:25,685 INFO L479 AbstractCegarLoop]: Abstraction has 30940 states and 46378 transitions. [2020-10-12 19:40:25,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:40:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 30940 states and 46378 transitions. [2020-10-12 19:40:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:40:25,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:25,693 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:40:25,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:40:25,693 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1851688712, now seen corresponding path program 1 times [2020-10-12 19:40:25,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:25,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055866187] [2020-10-12 19:40:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:25,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:25,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:25,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:25,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:25,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:25,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:26,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:26,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:30,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 19:40:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:30,968 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:40:30,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:30,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:30,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:30,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:30,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:40:30,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:31,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055866187] [2020-10-12 19:40:31,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:40:31,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:40:31,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721793566] [2020-10-12 19:40:31,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:40:31,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:31,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:40:31,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:31,010 INFO L87 Difference]: Start difference. First operand 30940 states and 46378 transitions. Second operand 8 states. [2020-10-12 19:40:31,162 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:40:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:44,657 INFO L93 Difference]: Finished difference Result 116657 states and 172605 transitions. [2020-10-12 19:40:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:40:44,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-12 19:40:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:44,762 INFO L225 Difference]: With dead ends: 116657 [2020-10-12 19:40:44,763 INFO L226 Difference]: Without dead ends: 85799 [2020-10-12 19:40:44,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:40:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85799 states. [2020-10-12 19:40:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85799 to 36298. [2020-10-12 19:40:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36298 states. [2020-10-12 19:40:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36298 states to 36298 states and 52664 transitions. [2020-10-12 19:40:51,846 INFO L78 Accepts]: Start accepts. Automaton has 36298 states and 52664 transitions. Word has length 96 [2020-10-12 19:40:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:51,846 INFO L479 AbstractCegarLoop]: Abstraction has 36298 states and 52664 transitions. [2020-10-12 19:40:51,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:40:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 36298 states and 52664 transitions. [2020-10-12 19:40:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:40:51,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:51,852 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:40:51,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:40:51,853 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash -849247413, now seen corresponding path program 1 times [2020-10-12 19:40:51,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:51,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818794990] [2020-10-12 19:40:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:51,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:51,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:51,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:51,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:56,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:56,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:56,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:40:56,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:40:56,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:40:56,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:40:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:56,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 19:40:56,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:57,129 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:40:57,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:57,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:57,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:57,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:57,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:57,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:40:57,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:57,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:57,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:57,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:57,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:57,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818794990] [2020-10-12 19:40:57,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:40:57,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:40:57,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464995324] [2020-10-12 19:40:57,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:40:57,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:57,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:40:57,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:57,172 INFO L87 Difference]: Start difference. First operand 36298 states and 52664 transitions. Second operand 8 states. [2020-10-12 19:40:57,331 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:41:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:41:19,755 INFO L93 Difference]: Finished difference Result 168698 states and 242944 transitions. [2020-10-12 19:41:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:41:19,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-12 19:41:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:41:19,913 INFO L225 Difference]: With dead ends: 168698 [2020-10-12 19:41:19,913 INFO L226 Difference]: Without dead ends: 132500 [2020-10-12 19:41:19,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:41:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132500 states. [2020-10-12 19:41:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132500 to 75142. [2020-10-12 19:41:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75142 states. [2020-10-12 19:41:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75142 states to 75142 states and 108384 transitions. [2020-10-12 19:41:34,145 INFO L78 Accepts]: Start accepts. Automaton has 75142 states and 108384 transitions. Word has length 96 [2020-10-12 19:41:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:41:34,146 INFO L479 AbstractCegarLoop]: Abstraction has 75142 states and 108384 transitions. [2020-10-12 19:41:34,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:41:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 75142 states and 108384 transitions. [2020-10-12 19:41:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:41:34,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:41:34,155 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:41:34,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:41:34,155 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:41:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:41:34,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1923467115, now seen corresponding path program 1 times [2020-10-12 19:41:34,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:41:34,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832531742] [2020-10-12 19:41:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:41:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:41:34,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:34,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:34,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:35,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:35,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:39,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:41:39,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:41:39,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:41:39,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:41:39,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:41:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:41:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:41:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:41:39,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:41:39,542 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 19:41:39,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:41:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:41:39,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:39,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:41:39,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:41:39,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:41:39,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:41:39,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:41:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:41:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:41:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:41:39,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:41:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:41:39,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832531742] [2020-10-12 19:41:39,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:41:39,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:41:39,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462188823] [2020-10-12 19:41:39,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:41:39,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:41:39,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:41:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:41:39,582 INFO L87 Difference]: Start difference. First operand 75142 states and 108384 transitions. Second operand 8 states. [2020-10-12 19:41:39,734 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 137