/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_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:31:27,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:31:27,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:31:27,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:31:27,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:31:27,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:31:27,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:31:27,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:31:27,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:31:27,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:31:27,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:31:27,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:31:27,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:31:27,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:31:27,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:31:27,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:31:27,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:31:27,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:31:27,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:31:27,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:31:27,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:31:27,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:31:27,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:31:27,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:31:27,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:31:27,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:31:27,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:31:27,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:31:27,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:31:27,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:31:27,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:31:27,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:31:27,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:31:27,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:31:27,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:31:27,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:31:27,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:31:27,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:31:27,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:31:27,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:31:27,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:31:27,864 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 14:31:27,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:31:27,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:31:27,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:31:27,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:31:27,890 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:31:27,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:31:27,890 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:31:27,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:31:27,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:31:27,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:31:27,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:31:27,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:31:27,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:31:27,891 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:31:27,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:31:27,892 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:31:27,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:31:27,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:31:27,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:31:27,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:31:27,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:31:27,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:31:27,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:31:27,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:31:27,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:31:27,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:31:27,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:31:27,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:31:27,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:31:27,894 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 14:31:28,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:31:28,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:31:28,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:31:28,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:31:28,200 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:31:28,200 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:31:28,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/251e5e263/b4e32c5677cc424f826392d8bd7870b7/FLAG120d27166 [2020-10-13 14:31:28,786 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:31:28,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:31:28,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/251e5e263/b4e32c5677cc424f826392d8bd7870b7/FLAG120d27166 [2020-10-13 14:31:29,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/251e5e263/b4e32c5677cc424f826392d8bd7870b7 [2020-10-13 14:31:29,116 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:31:29,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:31:29,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:31:29,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:31:29,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:31:29,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@391177e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29, skipping insertion in model container [2020-10-13 14:31:29,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:31:29,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:31:29,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:31:29,639 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:31:29,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:31:29,757 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:31:29,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29 WrapperNode [2020-10-13 14:31:29,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:31:29,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:31:29,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:31:29,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:31:29,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (1/1) ... [2020-10-13 14:31:29,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:31:29,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:31:29,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:31:29,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:31:29,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (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 14:31:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:31:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:31:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:31:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:31:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:31:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:31:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:31:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:31:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:31:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:31:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:31:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:31:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:31:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:31:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:31:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:31:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:31:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:31:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-13 14:31:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-13 14:31:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-13 14:31:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:31:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:31:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:31:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:31:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:31:30,675 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:31:30,676 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:31:30,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:31:30 BoogieIcfgContainer [2020-10-13 14:31:30,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:31:30,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:31:30,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:31:30,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:31:30,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:31:29" (1/3) ... [2020-10-13 14:31:30,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ebd909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:31:30, skipping insertion in model container [2020-10-13 14:31:30,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:31:29" (2/3) ... [2020-10-13 14:31:30,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ebd909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:31:30, skipping insertion in model container [2020-10-13 14:31:30,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:31:30" (3/3) ... [2020-10-13 14:31:30,690 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:31:30,700 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:31:30,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:31:30,721 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:31:30,744 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:31:30,744 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:31:30,744 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:31:30,744 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:31:30,745 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:31:30,745 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:31:30,745 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:31:30,745 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:31:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-10-13 14:31:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 14:31:30,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:31:30,781 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, 1, 1, 1, 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 14:31:30,782 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:31:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:31:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 691167960, now seen corresponding path program 1 times [2020-10-13 14:31:30,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:31:30,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411317163] [2020-10-13 14:31:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:31:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:31,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:31,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:32,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:32,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:32,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:35,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:35,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:36,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:36,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 14:31:36,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:31:36,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 14:31:36,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:31:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:31:36,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:31:36,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:31:36,861 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:31:36,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:31:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:36,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:36,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:31:36,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:31:36,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 14:31:36,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:36,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:31:36,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:31:36,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:31:36,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:31:36,988 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 14:31:36,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411317163] [2020-10-13 14:31:36,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:31:36,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:31:36,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96558250] [2020-10-13 14:31:37,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:31:37,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:31:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:31:37,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:31:37,025 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2020-10-13 14:31:37,444 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:31:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:31:39,170 INFO L93 Difference]: Finished difference Result 348 states and 567 transitions. [2020-10-13 14:31:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:31:39,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-13 14:31:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:31:39,196 INFO L225 Difference]: With dead ends: 348 [2020-10-13 14:31:39,196 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 14:31:39,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:31:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 14:31:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2020-10-13 14:31:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 14:31:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 345 transitions. [2020-10-13 14:31:39,301 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 345 transitions. Word has length 106 [2020-10-13 14:31:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:31:39,302 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 345 transitions. [2020-10-13 14:31:39,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:31:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 345 transitions. [2020-10-13 14:31:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 14:31:39,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:31:39,312 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, 1, 1, 1, 1, 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 14:31:39,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:31:39,313 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:31:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:31:39,313 INFO L82 PathProgramCache]: Analyzing trace with hash -280523462, now seen corresponding path program 1 times [2020-10-13 14:31:39,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:31:39,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490504528] [2020-10-13 14:31:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:31:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:39,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:39,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:39,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:40,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:40,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:40,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:44,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:44,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 14:31:44,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:31:44,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 14:31:44,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:44,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:31:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:31:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:31:44,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:31:44,859 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:31:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:31:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:44,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:44,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:44,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:31:44,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:31:44,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:31:44,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:44,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:31:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:31:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:31:44,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:31:44,967 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 14:31:44,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490504528] [2020-10-13 14:31:44,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:31:44,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:31:44,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923660797] [2020-10-13 14:31:44,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:31:44,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:31:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:31:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:31:44,974 INFO L87 Difference]: Start difference. First operand 242 states and 345 transitions. Second operand 4 states. [2020-10-13 14:31:45,406 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:31:46,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:31:46,175 INFO L93 Difference]: Finished difference Result 574 states and 873 transitions. [2020-10-13 14:31:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:31:46,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-13 14:31:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:31:46,181 INFO L225 Difference]: With dead ends: 574 [2020-10-13 14:31:46,181 INFO L226 Difference]: Without dead ends: 400 [2020-10-13 14:31:46,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:31:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-13 14:31:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2020-10-13 14:31:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-13 14:31:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 593 transitions. [2020-10-13 14:31:46,239 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 593 transitions. Word has length 107 [2020-10-13 14:31:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:31:46,242 INFO L479 AbstractCegarLoop]: Abstraction has 398 states and 593 transitions. [2020-10-13 14:31:46,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:31:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 593 transitions. [2020-10-13 14:31:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 14:31:46,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:31:46,246 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, 1, 1, 1, 1, 1, 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 14:31:46,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:31:46,247 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:31:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:31:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1676588769, now seen corresponding path program 1 times [2020-10-13 14:31:46,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:31:46,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577271967] [2020-10-13 14:31:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:31:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:46,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:46,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:46,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:47,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:47,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:51,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:51,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 14:31:51,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:31:51,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:31:51,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:31:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:31:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:31:51,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:51,680 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:31:51,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:31:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:51,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:51,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:31:51,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:31:51,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:31:51,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:31:51,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:31:51,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:31:51,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:51,770 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 14:31:51,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577271967] [2020-10-13 14:31:51,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:31:51,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:31:51,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021198513] [2020-10-13 14:31:51,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:31:51,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:31:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:31:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:31:51,777 INFO L87 Difference]: Start difference. First operand 398 states and 593 transitions. Second operand 4 states. [2020-10-13 14:31:52,027 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:31:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:31:52,854 INFO L93 Difference]: Finished difference Result 1026 states and 1591 transitions. [2020-10-13 14:31:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:31:52,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-13 14:31:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:31:52,859 INFO L225 Difference]: With dead ends: 1026 [2020-10-13 14:31:52,860 INFO L226 Difference]: Without dead ends: 696 [2020-10-13 14:31:52,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:31:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-10-13 14:31:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 694. [2020-10-13 14:31:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-13 14:31:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1061 transitions. [2020-10-13 14:31:52,893 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1061 transitions. Word has length 108 [2020-10-13 14:31:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:31:52,893 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1061 transitions. [2020-10-13 14:31:52,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:31:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1061 transitions. [2020-10-13 14:31:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 14:31:52,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:31:52,895 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, 1, 1, 1, 1, 1, 1, 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 14:31:52,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:31:52,896 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:31:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:31:52,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1632352390, now seen corresponding path program 1 times [2020-10-13 14:31:52,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:31:52,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589390637] [2020-10-13 14:31:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:31:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:52,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:53,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:54,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:54,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:57,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:57,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 14:31:57,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:31:57,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:31:57,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:31:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:31:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:31:57,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:31:58,215 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:31:58,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:31:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:31:58,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:31:58,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:31:58,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:31:58,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:31:58,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:31:58,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:31:58,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:31:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:31:58,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:31:58,290 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 14:31:58,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589390637] [2020-10-13 14:31:58,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:31:58,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:31:58,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720256855] [2020-10-13 14:31:58,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:31:58,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:31:58,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:31:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:31:58,294 INFO L87 Difference]: Start difference. First operand 694 states and 1061 transitions. Second operand 4 states. [2020-10-13 14:31:58,625 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:31:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:31:59,838 INFO L93 Difference]: Finished difference Result 1882 states and 2943 transitions. [2020-10-13 14:31:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:31:59,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-13 14:31:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:31:59,854 INFO L225 Difference]: With dead ends: 1882 [2020-10-13 14:31:59,854 INFO L226 Difference]: Without dead ends: 1256 [2020-10-13 14:31:59,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:31:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-10-13 14:31:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1254. [2020-10-13 14:31:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1254 states. [2020-10-13 14:31:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1941 transitions. [2020-10-13 14:31:59,931 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1941 transitions. Word has length 109 [2020-10-13 14:31:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:31:59,933 INFO L479 AbstractCegarLoop]: Abstraction has 1254 states and 1941 transitions. [2020-10-13 14:31:59,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:31:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1941 transitions. [2020-10-13 14:31:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 14:31:59,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:31:59,936 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, 1, 1, 1, 1, 1, 1, 1, 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 14:31:59,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:31:59,936 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:31:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:31:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1929619101, now seen corresponding path program 1 times [2020-10-13 14:31:59,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:31:59,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838315782] [2020-10-13 14:31:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:31:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:31:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:00,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:00,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:00,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:00,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:00,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:01,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:01,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:01,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:02,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:02,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:04,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:04,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 14:32:04,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:32:04,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:32:04,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:32:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:32:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:32:04,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:05,237 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:32:05,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:05,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:05,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:05,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:05,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:32:05,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:05,285 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 14:32:05,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838315782] [2020-10-13 14:32:05,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:05,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:32:05,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167625093] [2020-10-13 14:32:05,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:32:05,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:32:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:32:05,288 INFO L87 Difference]: Start difference. First operand 1254 states and 1941 transitions. Second operand 4 states. [2020-10-13 14:32:05,532 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:32:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:06,445 INFO L93 Difference]: Finished difference Result 3498 states and 5479 transitions. [2020-10-13 14:32:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:32:06,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-13 14:32:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:06,459 INFO L225 Difference]: With dead ends: 3498 [2020-10-13 14:32:06,459 INFO L226 Difference]: Without dead ends: 2312 [2020-10-13 14:32:06,462 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 14:32:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2020-10-13 14:32:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2310. [2020-10-13 14:32:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2310 states. [2020-10-13 14:32:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3589 transitions. [2020-10-13 14:32:06,575 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3589 transitions. Word has length 110 [2020-10-13 14:32:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:06,575 INFO L479 AbstractCegarLoop]: Abstraction has 2310 states and 3589 transitions. [2020-10-13 14:32:06,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:32:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3589 transitions. [2020-10-13 14:32:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:32:06,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:06,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:06,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:32:06,578 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1903239537, now seen corresponding path program 1 times [2020-10-13 14:32:06,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:06,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606646583] [2020-10-13 14:32:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:06,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:06,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:06,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:06,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:07,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:07,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:07,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:11,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:11,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:32:11,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:32:11,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:32:11,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:11,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:32:11,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:32:11,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 14:32:11,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:11,871 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:32:11,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:11,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:11,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:11,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:11,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:11,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:32:11,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:11,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:11,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:11,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:11,921 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 14:32:11,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606646583] [2020-10-13 14:32:11,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:11,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:32:11,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104449831] [2020-10-13 14:32:11,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:32:11,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:11,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:32:11,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:32:11,923 INFO L87 Difference]: Start difference. First operand 2310 states and 3589 transitions. Second operand 4 states. [2020-10-13 14:32:12,189 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:32:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:13,147 INFO L93 Difference]: Finished difference Result 6538 states and 10215 transitions. [2020-10-13 14:32:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:32:13,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-13 14:32:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:13,170 INFO L225 Difference]: With dead ends: 6538 [2020-10-13 14:32:13,171 INFO L226 Difference]: Without dead ends: 4296 [2020-10-13 14:32:13,179 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 14:32:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2020-10-13 14:32:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2020-10-13 14:32:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4294 states. [2020-10-13 14:32:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6661 transitions. [2020-10-13 14:32:13,412 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6661 transitions. Word has length 111 [2020-10-13 14:32:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:13,413 INFO L479 AbstractCegarLoop]: Abstraction has 4294 states and 6661 transitions. [2020-10-13 14:32:13,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:32:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6661 transitions. [2020-10-13 14:32:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 14:32:13,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:13,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:13,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:32:13,415 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:13,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:13,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1548074674, now seen corresponding path program 1 times [2020-10-13 14:32:13,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:13,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979023645] [2020-10-13 14:32:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:13,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:13,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:13,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:13,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:13,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:13,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:14,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:18,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:18,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 14:32:18,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:32:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:32:18,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:32:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:32:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 14:32:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:18,748 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:32:18,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:18,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:18,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:18,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:18,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:18,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:32:18,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:18,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:18,797 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 14:32:18,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979023645] [2020-10-13 14:32:18,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:18,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:32:18,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895257623] [2020-10-13 14:32:18,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:32:18,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:18,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:32:18,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:32:18,800 INFO L87 Difference]: Start difference. First operand 4294 states and 6661 transitions. Second operand 4 states. [2020-10-13 14:32:19,029 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:32:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:19,987 INFO L93 Difference]: Finished difference Result 12234 states and 19015 transitions. [2020-10-13 14:32:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:32:19,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-13 14:32:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:20,030 INFO L225 Difference]: With dead ends: 12234 [2020-10-13 14:32:20,030 INFO L226 Difference]: Without dead ends: 8008 [2020-10-13 14:32:20,041 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 14:32:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2020-10-13 14:32:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 8006. [2020-10-13 14:32:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8006 states. [2020-10-13 14:32:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 12357 transitions. [2020-10-13 14:32:20,406 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 12357 transitions. Word has length 112 [2020-10-13 14:32:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:20,407 INFO L479 AbstractCegarLoop]: Abstraction has 8006 states and 12357 transitions. [2020-10-13 14:32:20,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:32:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 12357 transitions. [2020-10-13 14:32:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:32:20,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:20,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:20,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:32:20,409 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1523696999, now seen corresponding path program 1 times [2020-10-13 14:32:20,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:20,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503021603] [2020-10-13 14:32:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:20,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:20,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:20,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:21,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:21,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:22,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:22,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:23,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:25,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:25,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:32:25,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:32:25,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:32:25,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:32:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:32:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 14:32:25,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:25,723 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:32:25,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:25,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:25,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:25,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:25,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:25,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:32:25,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:25,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:25,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:25,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:25,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:25,758 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 14:32:25,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503021603] [2020-10-13 14:32:25,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:25,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:32:25,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979667529] [2020-10-13 14:32:25,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:32:25,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:25,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:32:25,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:32:25,761 INFO L87 Difference]: Start difference. First operand 8006 states and 12357 transitions. Second operand 7 states. [2020-10-13 14:32:26,024 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:32:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:28,614 INFO L93 Difference]: Finished difference Result 71318 states and 110285 transitions. [2020-10-13 14:32:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:32:28,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-13 14:32:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:28,807 INFO L225 Difference]: With dead ends: 71318 [2020-10-13 14:32:28,807 INFO L226 Difference]: Without dead ends: 63380 [2020-10-13 14:32:28,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:32:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63380 states. [2020-10-13 14:32:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63380 to 23750. [2020-10-13 14:32:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23750 states. [2020-10-13 14:32:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23750 states to 23750 states and 36613 transitions. [2020-10-13 14:32:31,324 INFO L78 Accepts]: Start accepts. Automaton has 23750 states and 36613 transitions. Word has length 113 [2020-10-13 14:32:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:31,324 INFO L479 AbstractCegarLoop]: Abstraction has 23750 states and 36613 transitions. [2020-10-13 14:32:31,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:32:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23750 states and 36613 transitions. [2020-10-13 14:32:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:32:31,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:31,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:31,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:32:31,327 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1049939422, now seen corresponding path program 1 times [2020-10-13 14:32:31,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:31,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052182204] [2020-10-13 14:32:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:31,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:31,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:31,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:31,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:31,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:31,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:34,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:34,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:34,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:36,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:36,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:32:36,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:32:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:32:36,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:32:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 14:32:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 14:32:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:36,635 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:32:36,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:36,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:36,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:36,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:36,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:36,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:32:36,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:36,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:36,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:36,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:36,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:36,666 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 14:32:36,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052182204] [2020-10-13 14:32:36,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:36,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:32:36,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297050276] [2020-10-13 14:32:36,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:32:36,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:32:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:32:36,668 INFO L87 Difference]: Start difference. First operand 23750 states and 36613 transitions. Second operand 7 states. [2020-10-13 14:32:36,931 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:32:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:43,631 INFO L93 Difference]: Finished difference Result 212630 states and 327821 transitions. [2020-10-13 14:32:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:32:43,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-13 14:32:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:44,088 INFO L225 Difference]: With dead ends: 212630 [2020-10-13 14:32:44,088 INFO L226 Difference]: Without dead ends: 188948 [2020-10-13 14:32:45,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:32:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188948 states. [2020-10-13 14:32:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188948 to 70726. [2020-10-13 14:32:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70726 states. [2020-10-13 14:32:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70726 states to 70726 states and 108741 transitions. [2020-10-13 14:32:49,922 INFO L78 Accepts]: Start accepts. Automaton has 70726 states and 108741 transitions. Word has length 113 [2020-10-13 14:32:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:49,922 INFO L479 AbstractCegarLoop]: Abstraction has 70726 states and 108741 transitions. [2020-10-13 14:32:49,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:32:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 70726 states and 108741 transitions. [2020-10-13 14:32:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:32:49,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:49,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:49,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:32:49,923 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1780956317, now seen corresponding path program 1 times [2020-10-13 14:32:49,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:49,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326902382] [2020-10-13 14:32:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:49,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:54,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:54,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:32:54,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:32:54,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:32:54,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:32:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:32:54,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 14:32:54,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:55,217 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:32:55,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:55,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:55,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:55,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:55,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:32:55,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:55,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:55,250 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 14:32:55,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326902382] [2020-10-13 14:32:55,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:55,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:32:55,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475227129] [2020-10-13 14:32:55,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:32:55,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:55,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:32:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:32:55,252 INFO L87 Difference]: Start difference. First operand 70726 states and 108741 transitions. Second operand 7 states. [2020-10-13 14:32:55,519 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:33:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:33:13,248 INFO L93 Difference]: Finished difference Result 415734 states and 638586 transitions. [2020-10-13 14:33:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:33:13,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-13 14:33:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:33:13,762 INFO L225 Difference]: With dead ends: 415734 [2020-10-13 14:33:13,762 INFO L226 Difference]: Without dead ends: 368564 [2020-10-13 14:33:13,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:33:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368564 states. [2020-10-13 14:33:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368564 to 140838. [2020-10-13 14:33:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140838 states. [2020-10-13 14:33:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140838 states to 140838 states and 215730 transitions. [2020-10-13 14:33:21,353 INFO L78 Accepts]: Start accepts. Automaton has 140838 states and 215730 transitions. Word has length 113 [2020-10-13 14:33:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:33:21,353 INFO L479 AbstractCegarLoop]: Abstraction has 140838 states and 215730 transitions. [2020-10-13 14:33:21,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:33:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 140838 states and 215730 transitions. [2020-10-13 14:33:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:33:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:33:21,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:33:21,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:33:21,355 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:33:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:33:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash 277445767, now seen corresponding path program 1 times [2020-10-13 14:33:21,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:33:21,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298951805] [2020-10-13 14:33:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:33:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:21,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:21,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:21,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:21,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:21,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:21,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:26,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:26,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:33:26,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:33:26,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:33:26,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:33:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 14:33:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 14:33:26,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:26,650 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:33:26,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:26,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:26,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:26,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:33:26,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:26,680 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 14:33:26,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298951805] [2020-10-13 14:33:26,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:26,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:33:26,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051291336] [2020-10-13 14:33:26,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:33:26,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:33:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:33:26,682 INFO L87 Difference]: Start difference. First operand 140838 states and 215730 transitions. Second operand 7 states. [2020-10-13 14:33:26,932 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-13 14:34:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:14,017 INFO L93 Difference]: Finished difference Result 1040381 states and 1592486 transitions. [2020-10-13 14:34:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:34:14,017 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-13 14:34:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:15,437 INFO L225 Difference]: With dead ends: 1040381 [2020-10-13 14:34:15,437 INFO L226 Difference]: Without dead ends: 899643 [2020-10-13 14:34:15,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:34:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899643 states. [2020-10-13 14:34:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899643 to 280445. [2020-10-13 14:34:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280445 states. [2020-10-13 14:34:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280445 states to 280445 states and 427918 transitions. [2020-10-13 14:34:41,642 INFO L78 Accepts]: Start accepts. Automaton has 280445 states and 427918 transitions. Word has length 113 [2020-10-13 14:34:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:41,643 INFO L479 AbstractCegarLoop]: Abstraction has 280445 states and 427918 transitions. [2020-10-13 14:34:41,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:34:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 280445 states and 427918 transitions. [2020-10-13 14:34:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 14:34:41,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:41,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:34:41,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:34:41,645 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1564584766, now seen corresponding path program 1 times [2020-10-13 14:34:41,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:41,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320838451] [2020-10-13 14:34:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:41,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:41,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:48,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:48,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 14:34:48,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:34:48,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7314 [2020-10-13 14:34:48,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:48,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:34:48,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:34:48,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 14:34:48,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:49,253 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-13 14:34:49,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:49,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:49,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:49,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:49,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:49,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 14:34:49,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:49,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:34:49,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:49,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:34:49,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:49,309 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 14:34:49,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320838451] [2020-10-13 14:34:49,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:49,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:34:49,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039525925] [2020-10-13 14:34:49,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:34:49,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:49,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:34:49,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:34:49,312 INFO L87 Difference]: Start difference. First operand 280445 states and 427918 transitions. Second operand 6 states. [2020-10-13 14:34:49,608 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 196