/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=NARROWEST --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_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:55:52,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:55:52,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:55:53,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:55:53,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:55:53,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:55:53,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:55:53,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:55:53,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:55:53,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:55:53,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:55:53,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:55:53,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:55:53,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:55:53,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:55:53,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:55:53,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:55:53,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:55:53,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:55:53,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:55:53,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:55:53,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:55:53,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:55:53,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:55:53,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:55:53,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:55:53,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:55:53,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:55:53,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:55:53,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:55:53,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:55:53,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:55:53,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:55:53,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:55:53,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:55:53,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:55:53,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:55:53,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:55:53,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:55:53,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:55:53,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:55:53,064 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 [2020-10-13 14:55:53,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:55:53,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:55:53,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:55:53,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:55:53,118 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:55:53,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:55:53,119 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:55:53,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:55:53,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:55:53,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:55:53,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:55:53,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:55:53,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:55:53,120 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:55:53,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:55:53,121 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:55:53,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:55:53,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:55:53,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:55:53,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:55:53,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:55:53,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:55:53,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:55:53,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:55:53,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:55:53,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:55:53,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:55:53,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:55:53,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:55:53,124 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:55:53,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:55:53,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:55:53,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:55:53,453 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:55:53,453 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:55:53,454 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:55:53,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edfb40d83/74f1b817063c47b3ac82c235af426ac8/FLAG8d13d1782 [2020-10-13 14:55:54,065 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:55:54,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:55:54,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edfb40d83/74f1b817063c47b3ac82c235af426ac8/FLAG8d13d1782 [2020-10-13 14:55:54,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edfb40d83/74f1b817063c47b3ac82c235af426ac8 [2020-10-13 14:55:54,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:55:54,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:55:54,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:55:54,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:55:54,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:55:54,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b255298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54, skipping insertion in model container [2020-10-13 14:55:54,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:55:54,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:55:54,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:55:54,804 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:55:54,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:55:54,928 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:55:54,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54 WrapperNode [2020-10-13 14:55:54,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:55:54,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:55:54,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:55:54,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:55:54,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (1/1) ... [2020-10-13 14:55:54,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:55:54,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:55:54,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:55:54,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:55:54,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (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 [2020-10-13 14:55:55,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:55:55,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:55:55,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:55:55,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:55:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:55:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:55:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:55:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:55:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:55:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:55:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:55:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:55:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:55:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:55:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:55:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:55:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:55:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:55:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:55:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:55:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:55:55,830 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:55:55,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:55:55,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:55:55 BoogieIcfgContainer [2020-10-13 14:55:55,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:55:55,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:55:55,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:55:55,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:55:55,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:55:54" (1/3) ... [2020-10-13 14:55:55,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202ecfea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:55:55, skipping insertion in model container [2020-10-13 14:55:55,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:55:54" (2/3) ... [2020-10-13 14:55:55,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202ecfea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:55:55, skipping insertion in model container [2020-10-13 14:55:55,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:55:55" (3/3) ... [2020-10-13 14:55:55,846 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:55:55,857 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:55:55,865 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:55:55,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:55:55,902 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:55:55,903 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:55:55,903 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:55:55,903 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:55:55,903 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:55:55,903 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:55:55,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:55:55,904 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:55:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-10-13 14:55:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:55:55,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:55,937 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] [2020-10-13 14:55:55,938 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1725986399, now seen corresponding path program 1 times [2020-10-13 14:55:55,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:55,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651920138] [2020-10-13 14:55:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:56,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:56,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:57,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:58,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:58,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:55:58,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:55:58,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2140 [2020-10-13 14:55:58,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:55:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:55:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:55:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:55:58,869 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:55:58,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:58,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:58,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:58,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:58,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:58,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:55:58,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:55:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:58,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651920138] [2020-10-13 14:55:58,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:58,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:55:58,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656193578] [2020-10-13 14:55:58,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:55:58,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:55:58,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:55:58,940 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 6 states. [2020-10-13 14:55:59,233 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:56:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:00,201 INFO L93 Difference]: Finished difference Result 746 states and 1238 transitions. [2020-10-13 14:56:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:56:00,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:56:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:00,223 INFO L225 Difference]: With dead ends: 746 [2020-10-13 14:56:00,223 INFO L226 Difference]: Without dead ends: 631 [2020-10-13 14:56:00,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:56:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-13 14:56:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 249. [2020-10-13 14:56:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 14:56:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 392 transitions. [2020-10-13 14:56:00,342 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 392 transitions. Word has length 66 [2020-10-13 14:56:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:00,343 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 392 transitions. [2020-10-13 14:56:00,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:56:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 392 transitions. [2020-10-13 14:56:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:56:00,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:00,346 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] [2020-10-13 14:56:00,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:56:00,347 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:00,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1904360380, now seen corresponding path program 1 times [2020-10-13 14:56:00,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:00,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578113627] [2020-10-13 14:56:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:01,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:02,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:02,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:56:02,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:02,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2478 [2020-10-13 14:56:02,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:02,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:56:02,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:56:02,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:56:02,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:03,125 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:03,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:03,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:03,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:56:03,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:03,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:03,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:03,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:03,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578113627] [2020-10-13 14:56:03,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:03,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:56:03,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963048011] [2020-10-13 14:56:03,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:56:03,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:56:03,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:56:03,169 INFO L87 Difference]: Start difference. First operand 249 states and 392 transitions. Second operand 7 states. [2020-10-13 14:56:03,400 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-13 14:56:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:04,603 INFO L93 Difference]: Finished difference Result 1585 states and 2595 transitions. [2020-10-13 14:56:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:56:04,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-13 14:56:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:04,612 INFO L225 Difference]: With dead ends: 1585 [2020-10-13 14:56:04,612 INFO L226 Difference]: Without dead ends: 1397 [2020-10-13 14:56:04,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:56:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-10-13 14:56:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 742. [2020-10-13 14:56:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-10-13 14:56:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1205 transitions. [2020-10-13 14:56:04,692 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1205 transitions. Word has length 67 [2020-10-13 14:56:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:04,694 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 1205 transitions. [2020-10-13 14:56:04,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:56:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1205 transitions. [2020-10-13 14:56:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:56:04,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:04,703 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, 1] [2020-10-13 14:56:04,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:56:04,704 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:04,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1151422778, now seen corresponding path program 1 times [2020-10-13 14:56:04,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:04,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470617605] [2020-10-13 14:56:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:04,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:04,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:04,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:05,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:07,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:56:07,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:07,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2323 [2020-10-13 14:56:07,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:07,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:07,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:56:07,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:56:07,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:07,258 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:07,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:07,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:07,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:07,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:07,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:07,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:56:07,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:07,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:07,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:07,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:07,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:07,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470617605] [2020-10-13 14:56:07,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:07,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:07,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109825042] [2020-10-13 14:56:07,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:07,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:07,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:07,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:07,294 INFO L87 Difference]: Start difference. First operand 742 states and 1205 transitions. Second operand 5 states. [2020-10-13 14:56:07,524 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:56:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:08,265 INFO L93 Difference]: Finished difference Result 2611 states and 4294 transitions. [2020-10-13 14:56:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:56:08,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 14:56:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:08,279 INFO L225 Difference]: With dead ends: 2611 [2020-10-13 14:56:08,279 INFO L226 Difference]: Without dead ends: 1992 [2020-10-13 14:56:08,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:56:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-10-13 14:56:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1364. [2020-10-13 14:56:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1364 states. [2020-10-13 14:56:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 2229 transitions. [2020-10-13 14:56:08,410 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 2229 transitions. Word has length 68 [2020-10-13 14:56:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:08,411 INFO L479 AbstractCegarLoop]: Abstraction has 1364 states and 2229 transitions. [2020-10-13 14:56:08,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 2229 transitions. [2020-10-13 14:56:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:56:08,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:08,413 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, 1, 1] [2020-10-13 14:56:08,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:56:08,414 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:08,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:08,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1386862141, now seen corresponding path program 1 times [2020-10-13 14:56:08,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:08,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389001926] [2020-10-13 14:56:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:08,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:08,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:08,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:08,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:10,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:10,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:56:10,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:10,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2153 [2020-10-13 14:56:10,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:56:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:56:10,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:10,794 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:10,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:10,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:10,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:10,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:10,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:10,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:56:10,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:10,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:10,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:10,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389001926] [2020-10-13 14:56:10,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:10,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:10,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055858553] [2020-10-13 14:56:10,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:10,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:10,840 INFO L87 Difference]: Start difference. First operand 1364 states and 2229 transitions. Second operand 5 states. [2020-10-13 14:56:11,044 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:56:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:11,841 INFO L93 Difference]: Finished difference Result 5051 states and 8310 transitions. [2020-10-13 14:56:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:56:11,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 14:56:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:11,866 INFO L225 Difference]: With dead ends: 5051 [2020-10-13 14:56:11,866 INFO L226 Difference]: Without dead ends: 3822 [2020-10-13 14:56:11,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:56:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2020-10-13 14:56:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2577. [2020-10-13 14:56:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2577 states. [2020-10-13 14:56:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4219 transitions. [2020-10-13 14:56:12,070 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4219 transitions. Word has length 69 [2020-10-13 14:56:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:12,070 INFO L479 AbstractCegarLoop]: Abstraction has 2577 states and 4219 transitions. [2020-10-13 14:56:12,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4219 transitions. [2020-10-13 14:56:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:56:12,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:12,073 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, 1, 1, 1, 1] [2020-10-13 14:56:12,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:56:12,073 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1470676787, now seen corresponding path program 1 times [2020-10-13 14:56:12,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:12,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470757746] [2020-10-13 14:56:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:12,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:12,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:12,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:12,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:13,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:13,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:56:13,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:13,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-13 14:56:13,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:13,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:13,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:56:13,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:56:13,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:13,637 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:13,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:13,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:13,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:13,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:13,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:13,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:56:13,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:13,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:13,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:13,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:13,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470757746] [2020-10-13 14:56:13,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:13,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:13,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237831099] [2020-10-13 14:56:13,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:13,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:13,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:13,678 INFO L87 Difference]: Start difference. First operand 2577 states and 4219 transitions. Second operand 4 states. [2020-10-13 14:56:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:14,541 INFO L93 Difference]: Finished difference Result 6848 states and 11185 transitions. [2020-10-13 14:56:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:14,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 14:56:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:14,569 INFO L225 Difference]: With dead ends: 6848 [2020-10-13 14:56:14,570 INFO L226 Difference]: Without dead ends: 4406 [2020-10-13 14:56:14,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2020-10-13 14:56:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 4347. [2020-10-13 14:56:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4347 states. [2020-10-13 14:56:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 7006 transitions. [2020-10-13 14:56:14,837 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 7006 transitions. Word has length 71 [2020-10-13 14:56:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:14,837 INFO L479 AbstractCegarLoop]: Abstraction has 4347 states and 7006 transitions. [2020-10-13 14:56:14,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 7006 transitions. [2020-10-13 14:56:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:56:14,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:14,840 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, 1, 1, 1, 1, 1] [2020-10-13 14:56:14,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:56:14,840 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash 7098157, now seen corresponding path program 1 times [2020-10-13 14:56:14,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:14,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937664912] [2020-10-13 14:56:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:14,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:14,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:14,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:18,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:18,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:19,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:19,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:56:19,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:56:19,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:56:19,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:56:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 14:56:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:56:20,141 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:20,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:20,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:20,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:20,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:20,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:56:20,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:20,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:20,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:20,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937664912] [2020-10-13 14:56:20,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:20,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:20,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107541911] [2020-10-13 14:56:20,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:20,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:20,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:20,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:20,199 INFO L87 Difference]: Start difference. First operand 4347 states and 7006 transitions. Second operand 5 states. [2020-10-13 14:56:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:21,612 INFO L93 Difference]: Finished difference Result 12297 states and 19807 transitions. [2020-10-13 14:56:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:21,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 14:56:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:21,656 INFO L225 Difference]: With dead ends: 12297 [2020-10-13 14:56:21,656 INFO L226 Difference]: Without dead ends: 8135 [2020-10-13 14:56:21,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8135 states. [2020-10-13 14:56:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8135 to 4579. [2020-10-13 14:56:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4579 states. [2020-10-13 14:56:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 7354 transitions. [2020-10-13 14:56:21,973 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 7354 transitions. Word has length 72 [2020-10-13 14:56:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:21,974 INFO L479 AbstractCegarLoop]: Abstraction has 4579 states and 7354 transitions. [2020-10-13 14:56:21,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 7354 transitions. [2020-10-13 14:56:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:56:21,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:21,976 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, 1, 1, 1, 1, 1] [2020-10-13 14:56:21,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:56:21,977 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash -657384593, now seen corresponding path program 1 times [2020-10-13 14:56:21,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:21,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697571003] [2020-10-13 14:56:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:22,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:23,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:27,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:27,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:56:27,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:56:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:56:27,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:56:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 14:56:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:27,205 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:27,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:27,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:27,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:27,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:27,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:56:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:27,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697571003] [2020-10-13 14:56:27,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:27,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:27,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270342715] [2020-10-13 14:56:27,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:27,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:27,256 INFO L87 Difference]: Start difference. First operand 4579 states and 7354 transitions. Second operand 4 states. [2020-10-13 14:56:27,547 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:56:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:29,192 INFO L93 Difference]: Finished difference Result 12509 states and 20144 transitions. [2020-10-13 14:56:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:29,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:56:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:29,244 INFO L225 Difference]: With dead ends: 12509 [2020-10-13 14:56:29,244 INFO L226 Difference]: Without dead ends: 8008 [2020-10-13 14:56:29,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2020-10-13 14:56:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 8006. [2020-10-13 14:56:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8006 states. [2020-10-13 14:56:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 12838 transitions. [2020-10-13 14:56:29,785 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 12838 transitions. Word has length 72 [2020-10-13 14:56:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:29,785 INFO L479 AbstractCegarLoop]: Abstraction has 8006 states and 12838 transitions. [2020-10-13 14:56:29,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 12838 transitions. [2020-10-13 14:56:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:56:29,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:29,787 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, 1, 1, 1, 1, 1] [2020-10-13 14:56:29,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:56:29,788 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:29,788 INFO L82 PathProgramCache]: Analyzing trace with hash -298977637, now seen corresponding path program 1 times [2020-10-13 14:56:29,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:29,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844310196] [2020-10-13 14:56:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:34,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 14:56:34,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:35,049 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:35,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:35,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:35,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:35,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:35,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:56:35,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:35,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:35,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844310196] [2020-10-13 14:56:35,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:35,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:35,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706691367] [2020-10-13 14:56:35,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:35,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:35,086 INFO L87 Difference]: Start difference. First operand 8006 states and 12838 transitions. Second operand 5 states. [2020-10-13 14:56:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:36,693 INFO L93 Difference]: Finished difference Result 22410 states and 35792 transitions. [2020-10-13 14:56:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:36,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 14:56:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:36,734 INFO L225 Difference]: With dead ends: 22410 [2020-10-13 14:56:36,735 INFO L226 Difference]: Without dead ends: 14576 [2020-10-13 14:56:36,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14576 states. [2020-10-13 14:56:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14576 to 14322. [2020-10-13 14:56:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14322 states. [2020-10-13 14:56:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 22606 transitions. [2020-10-13 14:56:37,391 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 22606 transitions. Word has length 72 [2020-10-13 14:56:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:37,392 INFO L479 AbstractCegarLoop]: Abstraction has 14322 states and 22606 transitions. [2020-10-13 14:56:37,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 22606 transitions. [2020-10-13 14:56:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:56:37,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:37,394 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, 1, 1, 1, 1, 1] [2020-10-13 14:56:37,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:56:37,395 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1199623947, now seen corresponding path program 1 times [2020-10-13 14:56:37,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:37,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012052187] [2020-10-13 14:56:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:39,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:42,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:56:42,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:56:42,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:56:42,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 14:56:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:56:42,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:42,608 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:42,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:42,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:42,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:42,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:42,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:56:42,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:42,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:42,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012052187] [2020-10-13 14:56:42,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:42,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:42,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616176879] [2020-10-13 14:56:42,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:42,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:42,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:42,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:42,634 INFO L87 Difference]: Start difference. First operand 14322 states and 22606 transitions. Second operand 4 states. [2020-10-13 14:56:42,836 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:56:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:44,387 INFO L93 Difference]: Finished difference Result 38862 states and 61344 transitions. [2020-10-13 14:56:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:44,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:56:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:44,460 INFO L225 Difference]: With dead ends: 38862 [2020-10-13 14:56:44,461 INFO L226 Difference]: Without dead ends: 24680 [2020-10-13 14:56:44,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24680 states. [2020-10-13 14:56:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24680 to 24638. [2020-10-13 14:56:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24638 states. [2020-10-13 14:56:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24638 states to 24638 states and 38656 transitions. [2020-10-13 14:56:45,760 INFO L78 Accepts]: Start accepts. Automaton has 24638 states and 38656 transitions. Word has length 72 [2020-10-13 14:56:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:45,761 INFO L479 AbstractCegarLoop]: Abstraction has 24638 states and 38656 transitions. [2020-10-13 14:56:45,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24638 states and 38656 transitions. [2020-10-13 14:56:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:56:45,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:45,762 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, 1, 1, 1, 1, 1] [2020-10-13 14:56:45,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:56:45,763 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1399973400, now seen corresponding path program 1 times [2020-10-13 14:56:45,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:45,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382310795] [2020-10-13 14:56:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:45,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:46,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:56:46,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-13 14:56:46,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:46,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:46,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:56:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:56:46,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:46,348 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:46,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:46,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:46,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:46,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:46,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:56:46,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:46,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:46,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:46,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382310795] [2020-10-13 14:56:46,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:46,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:46,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960287225] [2020-10-13 14:56:46,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:46,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:46,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:46,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:46,376 INFO L87 Difference]: Start difference. First operand 24638 states and 38656 transitions. Second operand 4 states. [2020-10-13 14:56:46,577 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:56:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:48,790 INFO L93 Difference]: Finished difference Result 53042 states and 83398 transitions. [2020-10-13 14:56:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:48,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:56:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:48,880 INFO L225 Difference]: With dead ends: 53042 [2020-10-13 14:56:48,880 INFO L226 Difference]: Without dead ends: 28492 [2020-10-13 14:56:48,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28492 states. [2020-10-13 14:56:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28492 to 28430. [2020-10-13 14:56:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28430 states. [2020-10-13 14:56:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28430 states to 28430 states and 44547 transitions. [2020-10-13 14:56:50,226 INFO L78 Accepts]: Start accepts. Automaton has 28430 states and 44547 transitions. Word has length 72 [2020-10-13 14:56:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:50,226 INFO L479 AbstractCegarLoop]: Abstraction has 28430 states and 44547 transitions. [2020-10-13 14:56:50,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 28430 states and 44547 transitions. [2020-10-13 14:56:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:56:50,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:50,228 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, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:50,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:56:50,228 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 84467570, now seen corresponding path program 1 times [2020-10-13 14:56:50,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:50,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633533774] [2020-10-13 14:56:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:50,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:52,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:52,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:56:52,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:52,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2336 [2020-10-13 14:56:52,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 14:56:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 14:56:52,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:52,797 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:52,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:52,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:52,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:52,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:52,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:56:52,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:52,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:52,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633533774] [2020-10-13 14:56:52,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:52,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:52,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32315133] [2020-10-13 14:56:52,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:52,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:52,829 INFO L87 Difference]: Start difference. First operand 28430 states and 44547 transitions. Second operand 4 states. [2020-10-13 14:56:53,032 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:56:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:55,353 INFO L93 Difference]: Finished difference Result 68507 states and 106989 transitions. [2020-10-13 14:56:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:55,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 14:56:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:55,416 INFO L225 Difference]: With dead ends: 68507 [2020-10-13 14:56:55,417 INFO L226 Difference]: Without dead ends: 40157 [2020-10-13 14:56:55,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40157 states. [2020-10-13 14:56:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40157 to 39911. [2020-10-13 14:56:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39911 states. [2020-10-13 14:56:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39911 states to 39911 states and 61816 transitions. [2020-10-13 14:56:57,405 INFO L78 Accepts]: Start accepts. Automaton has 39911 states and 61816 transitions. Word has length 73 [2020-10-13 14:56:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:57,405 INFO L479 AbstractCegarLoop]: Abstraction has 39911 states and 61816 transitions. [2020-10-13 14:56:57,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 39911 states and 61816 transitions. [2020-10-13 14:56:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 14:56:57,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:57,406 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:57,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:56:57,407 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash -908075202, now seen corresponding path program 1 times [2020-10-13 14:56:57,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:57,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976929025] [2020-10-13 14:56:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:57,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:57,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:57,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:57,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:57,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:02,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 14:57:02,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:57:02,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:57:02,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:02,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 14:57:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:57:02,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:02,620 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:02,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:02,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:02,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:02,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:02,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:02,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:02,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:02,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:02,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:02,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:02,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976929025] [2020-10-13 14:57:02,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:02,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:02,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982687649] [2020-10-13 14:57:02,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:02,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:02,645 INFO L87 Difference]: Start difference. First operand 39911 states and 61816 transitions. Second operand 4 states. [2020-10-13 14:57:02,850 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:57:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:05,857 INFO L93 Difference]: Finished difference Result 83905 states and 129670 transitions. [2020-10-13 14:57:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:05,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-13 14:57:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:05,945 INFO L225 Difference]: With dead ends: 83905 [2020-10-13 14:57:05,945 INFO L226 Difference]: Without dead ends: 55554 [2020-10-13 14:57:05,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55554 states. [2020-10-13 14:57:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55554 to 55552. [2020-10-13 14:57:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55552 states. [2020-10-13 14:57:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55552 states to 55552 states and 84728 transitions. [2020-10-13 14:57:09,536 INFO L78 Accepts]: Start accepts. Automaton has 55552 states and 84728 transitions. Word has length 74 [2020-10-13 14:57:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:09,536 INFO L479 AbstractCegarLoop]: Abstraction has 55552 states and 84728 transitions. [2020-10-13 14:57:09,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 55552 states and 84728 transitions. [2020-10-13 14:57:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 14:57:09,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:09,537 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:09,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:57:09,537 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2006242383, now seen corresponding path program 1 times [2020-10-13 14:57:09,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:09,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713547753] [2020-10-13 14:57:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:09,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:13,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:13,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 14:57:13,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:57:13,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4411 [2020-10-13 14:57:13,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:13,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:57:13,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:57:13,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:57:13,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,202 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:14,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:14,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:14,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:14,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:14,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:14,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:14,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:14,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:14,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:14,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713547753] [2020-10-13 14:57:14,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:14,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:57:14,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001370759] [2020-10-13 14:57:14,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:57:14,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:57:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:14,236 INFO L87 Difference]: Start difference. First operand 55552 states and 84728 transitions. Second operand 6 states. [2020-10-13 14:57:14,493 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:57:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:19,757 INFO L93 Difference]: Finished difference Result 162269 states and 247828 transitions. [2020-10-13 14:57:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:57:19,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-13 14:57:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:19,926 INFO L225 Difference]: With dead ends: 162269 [2020-10-13 14:57:19,926 INFO L226 Difference]: Without dead ends: 106796 [2020-10-13 14:57:19,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:57:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106796 states. [2020-10-13 14:57:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106796 to 55552. [2020-10-13 14:57:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55552 states. [2020-10-13 14:57:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55552 states to 55552 states and 84500 transitions. [2020-10-13 14:57:24,700 INFO L78 Accepts]: Start accepts. Automaton has 55552 states and 84500 transitions. Word has length 75 [2020-10-13 14:57:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:24,701 INFO L479 AbstractCegarLoop]: Abstraction has 55552 states and 84500 transitions. [2020-10-13 14:57:24,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:57:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 55552 states and 84500 transitions. [2020-10-13 14:57:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 14:57:24,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:24,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:24,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:57:24,702 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:24,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1251421511, now seen corresponding path program 1 times [2020-10-13 14:57:24,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:24,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968053292] [2020-10-13 14:57:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:29,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 14:57:29,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:57:29,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-13 14:57:29,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:29,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:57:29,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 14:57:29,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:57:29,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:30,089 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:30,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:30,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:30,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:30,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:30,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:30,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:30,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:30,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:30,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:30,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:30,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:30,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968053292] [2020-10-13 14:57:30,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:30,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:57:30,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23513254] [2020-10-13 14:57:30,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:57:30,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:57:30,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:30,121 INFO L87 Difference]: Start difference. First operand 55552 states and 84500 transitions. Second operand 6 states. [2020-10-13 14:57:30,376 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:57:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:40,770 INFO L93 Difference]: Finished difference Result 255227 states and 389260 transitions. [2020-10-13 14:57:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:57:40,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-13 14:57:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:41,104 INFO L225 Difference]: With dead ends: 255227 [2020-10-13 14:57:41,104 INFO L226 Difference]: Without dead ends: 199754 [2020-10-13 14:57:41,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:57:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199754 states. [2020-10-13 14:57:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199754 to 103744. [2020-10-13 14:57:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103744 states. [2020-10-13 14:57:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103744 states to 103744 states and 157328 transitions. [2020-10-13 14:57:49,922 INFO L78 Accepts]: Start accepts. Automaton has 103744 states and 157328 transitions. Word has length 78 [2020-10-13 14:57:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:49,923 INFO L479 AbstractCegarLoop]: Abstraction has 103744 states and 157328 transitions. [2020-10-13 14:57:49,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:57:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 103744 states and 157328 transitions. [2020-10-13 14:57:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 14:57:49,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:49,925 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:49,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:57:49,925 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash -141270450, now seen corresponding path program 1 times [2020-10-13 14:57:49,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:49,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308773138] [2020-10-13 14:57:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:54,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:54,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 14:57:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:57:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4220 [2020-10-13 14:57:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 14:57:54,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:57:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:55,921 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:55,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:55,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:55,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:55,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:55,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:55,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:57:55,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:55,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:55,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:55,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:55,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:55,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308773138] [2020-10-13 14:57:55,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:55,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:55,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522197920] [2020-10-13 14:57:55,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:55,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:55,952 INFO L87 Difference]: Start difference. First operand 103744 states and 157328 transitions. Second operand 5 states. [2020-10-13 14:58:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:05,006 INFO L93 Difference]: Finished difference Result 146320 states and 220087 transitions. [2020-10-13 14:58:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:58:05,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-13 14:58:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:05,220 INFO L225 Difference]: With dead ends: 146320 [2020-10-13 14:58:05,220 INFO L226 Difference]: Without dead ends: 146318 [2020-10-13 14:58:05,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146318 states. [2020-10-13 14:58:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146318 to 104560. [2020-10-13 14:58:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104560 states. [2020-10-13 14:58:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104560 states to 104560 states and 158084 transitions. [2020-10-13 14:58:12,568 INFO L78 Accepts]: Start accepts. Automaton has 104560 states and 158084 transitions. Word has length 79 [2020-10-13 14:58:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:12,568 INFO L479 AbstractCegarLoop]: Abstraction has 104560 states and 158084 transitions. [2020-10-13 14:58:12,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 104560 states and 158084 transitions. [2020-10-13 14:58:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:58:12,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:12,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:12,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:58:12,571 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:12,571 INFO L82 PathProgramCache]: Analyzing trace with hash -935778543, now seen corresponding path program 1 times [2020-10-13 14:58:12,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:12,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090665069] [2020-10-13 14:58:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:58:17,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:58:17,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:58:17,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:17,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 14:58:17,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:58:17,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:17,810 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:58:17,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:17,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:17,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:17,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:17,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:17,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:17,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090665069] [2020-10-13 14:58:17,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:17,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:17,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425899968] [2020-10-13 14:58:17,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:17,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:17,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:17,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:17,839 INFO L87 Difference]: Start difference. First operand 104560 states and 158084 transitions. Second operand 4 states. [2020-10-13 14:58:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:25,258 INFO L93 Difference]: Finished difference Result 187653 states and 284157 transitions. [2020-10-13 14:58:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:25,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-13 14:58:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:25,377 INFO L225 Difference]: With dead ends: 187653 [2020-10-13 14:58:25,377 INFO L226 Difference]: Without dead ends: 83172 [2020-10-13 14:58:25,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:25,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83172 states. [2020-10-13 14:58:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83172 to 83170. [2020-10-13 14:58:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83170 states. [2020-10-13 14:58:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83170 states to 83170 states and 125241 transitions. [2020-10-13 14:58:30,849 INFO L78 Accepts]: Start accepts. Automaton has 83170 states and 125241 transitions. Word has length 103 [2020-10-13 14:58:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:30,849 INFO L479 AbstractCegarLoop]: Abstraction has 83170 states and 125241 transitions. [2020-10-13 14:58:30,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 83170 states and 125241 transitions. [2020-10-13 14:58:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:58:30,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:30,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:30,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:58:30,852 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:30,852 INFO L82 PathProgramCache]: Analyzing trace with hash -508521921, now seen corresponding path program 1 times [2020-10-13 14:58:30,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:30,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954220247] [2020-10-13 14:58:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:30,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:30,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:30,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:31,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:33,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:36,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:58:36,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:58:36,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5870 [2020-10-13 14:58:36,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:36,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:36,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:58:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 14:58:36,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:36,958 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:58:36,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:36,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:36,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:36,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:58:36,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:36,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:36,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954220247] [2020-10-13 14:58:36,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:36,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:36,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570151969] [2020-10-13 14:58:36,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:37,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:37,001 INFO L87 Difference]: Start difference. First operand 83170 states and 125241 transitions. Second operand 4 states. [2020-10-13 14:58:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:40,250 INFO L93 Difference]: Finished difference Result 119422 states and 179931 transitions. [2020-10-13 14:58:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:40,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-13 14:58:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:40,294 INFO L225 Difference]: With dead ends: 119422 [2020-10-13 14:58:40,294 INFO L226 Difference]: Without dead ends: 36397 [2020-10-13 14:58:40,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36397 states. [2020-10-13 14:58:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36397 to 35579. [2020-10-13 14:58:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35579 states. [2020-10-13 14:58:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35579 states to 35579 states and 53451 transitions. [2020-10-13 14:58:42,505 INFO L78 Accepts]: Start accepts. Automaton has 35579 states and 53451 transitions. Word has length 103 [2020-10-13 14:58:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:42,505 INFO L479 AbstractCegarLoop]: Abstraction has 35579 states and 53451 transitions. [2020-10-13 14:58:42,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 35579 states and 53451 transitions. [2020-10-13 14:58:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 14:58:42,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:42,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:42,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:58:42,508 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash 439183408, now seen corresponding path program 1 times [2020-10-13 14:58:42,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:42,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599201099] [2020-10-13 14:58:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:42,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:43,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:44,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:44,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:47,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:47,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 14:58:47,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:58:47,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:58:47,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:58:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:58:47,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:47,722 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:58:47,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:47,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:47,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:47,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:47,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:58:47,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:58:47,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599201099] [2020-10-13 14:58:47,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:47,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:47,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53459485] [2020-10-13 14:58:47,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:47,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:47,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:47,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:47,748 INFO L87 Difference]: Start difference. First operand 35579 states and 53451 transitions. Second operand 4 states. [2020-10-13 14:58:47,963 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:58:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:51,092 INFO L93 Difference]: Finished difference Result 76272 states and 114752 transitions. [2020-10-13 14:58:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:51,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-13 14:58:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:51,149 INFO L225 Difference]: With dead ends: 76272 [2020-10-13 14:58:51,149 INFO L226 Difference]: Without dead ends: 40801 [2020-10-13 14:58:51,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40801 states. [2020-10-13 14:58:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40801 to 40695. [2020-10-13 14:58:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40695 states. [2020-10-13 14:58:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40695 states to 40695 states and 61138 transitions. [2020-10-13 14:58:53,898 INFO L78 Accepts]: Start accepts. Automaton has 40695 states and 61138 transitions. Word has length 106 [2020-10-13 14:58:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:53,899 INFO L479 AbstractCegarLoop]: Abstraction has 40695 states and 61138 transitions. [2020-10-13 14:58:53,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 40695 states and 61138 transitions. [2020-10-13 14:58:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 14:58:53,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:53,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:53,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:58:53,901 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:53,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1840264206, now seen corresponding path program 1 times [2020-10-13 14:58:53,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:53,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998176491] [2020-10-13 14:58:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:53,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:53,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:58,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 14:58:58,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:58:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:58:58,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:58:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:58:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:59,159 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:58:59,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:59,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:59,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:58:59,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998176491] [2020-10-13 14:58:59,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:59,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:59,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326657942] [2020-10-13 14:58:59,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:59,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:59,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:59,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:59,189 INFO L87 Difference]: Start difference. First operand 40695 states and 61138 transitions. Second operand 5 states. [2020-10-13 14:59:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:06,107 INFO L93 Difference]: Finished difference Result 120403 states and 180537 transitions. [2020-10-13 14:59:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:06,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-13 14:59:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:06,229 INFO L225 Difference]: With dead ends: 120403 [2020-10-13 14:59:06,229 INFO L226 Difference]: Without dead ends: 79737 [2020-10-13 14:59:06,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79737 states. [2020-10-13 14:59:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79737 to 79735. [2020-10-13 14:59:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79735 states. [2020-10-13 14:59:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79735 states to 79735 states and 118741 transitions. [2020-10-13 14:59:13,091 INFO L78 Accepts]: Start accepts. Automaton has 79735 states and 118741 transitions. Word has length 110 [2020-10-13 14:59:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:13,092 INFO L479 AbstractCegarLoop]: Abstraction has 79735 states and 118741 transitions. [2020-10-13 14:59:13,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:13,092 INFO L276 IsEmpty]: Start isEmpty. Operand 79735 states and 118741 transitions. [2020-10-13 14:59:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:59:13,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:13,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:13,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:59:13,095 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2015271324, now seen corresponding path program 1 times [2020-10-13 14:59:13,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:13,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903162916] [2020-10-13 14:59:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:13,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:13,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:13,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:13,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:14,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:18,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:18,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:59:18,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:59:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:59:18,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:59:18,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:59:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:18,301 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:18,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:18,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:18,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:18,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:18,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:18,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:59:18,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:18,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:59:18,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903162916] [2020-10-13 14:59:18,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:18,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:18,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977433120] [2020-10-13 14:59:18,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:18,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:18,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:18,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:18,330 INFO L87 Difference]: Start difference. First operand 79735 states and 118741 transitions. Second operand 4 states. [2020-10-13 14:59:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:33,371 INFO L93 Difference]: Finished difference Result 239159 states and 356151 transitions. [2020-10-13 14:59:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:59:33,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-13 14:59:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:33,594 INFO L225 Difference]: With dead ends: 239159 [2020-10-13 14:59:33,594 INFO L226 Difference]: Without dead ends: 159456 [2020-10-13 14:59:33,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159456 states.