/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:00:51,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:00:51,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:00:51,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:00:51,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:00:51,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:00:51,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:00:51,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:00:51,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:00:51,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:00:51,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:00:51,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:00:51,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:00:51,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:00:51,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:00:51,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:00:51,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:00:51,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:00:51,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:00:51,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:00:51,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:00:51,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:00:51,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:00:51,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:00:51,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:00:51,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:00:51,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:00:51,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:00:51,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:00:51,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:00:51,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:00:51,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:00:51,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:00:51,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:00:51,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:00:51,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:00:51,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:00:51,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:00:51,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:00:51,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:00:51,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:00:51,873 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 15:00:51,897 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:00:51,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:00:51,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:00:51,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:00:51,899 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:00:51,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:00:51,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:00:51,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:00:51,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:00:51,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:00:51,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:00:51,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:00:51,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:00:51,901 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:00:51,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:00:51,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:00:51,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:00:51,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:00:51,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:00:51,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:00:51,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:00:51,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:00:51,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:00:51,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:00:51,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:00:51,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:00:51,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:00:51,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:00:51,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:00:51,905 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 15:00:52,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:00:52,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:00:52,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:00:52,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:00:52,229 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:00:52,230 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 15:00:52,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13b906356/7a5f235aa35147bd94ac6fc5a800bbf5/FLAG0b45983c0 [2020-10-13 15:00:52,785 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:00:52,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 15:00:52,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13b906356/7a5f235aa35147bd94ac6fc5a800bbf5/FLAG0b45983c0 [2020-10-13 15:00:53,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13b906356/7a5f235aa35147bd94ac6fc5a800bbf5 [2020-10-13 15:00:53,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:00:53,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:00:53,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:00:53,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:00:53,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:00:53,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:53,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184fc857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53, skipping insertion in model container [2020-10-13 15:00:53,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:53,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:00:53,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:00:53,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:00:53,615 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:00:53,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:00:53,943 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:00:53,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53 WrapperNode [2020-10-13 15:00:53,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:00:53,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:00:53,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:00:53,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:00:53,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:53,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:53,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:53,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:54,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:54,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:54,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (1/1) ... [2020-10-13 15:00:54,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:00:54,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:00:54,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:00:54,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:00:54,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (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 15:00:54,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:00:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:00:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:00:54,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:00:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:00:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 15:00:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 15:00:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:00:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 15:00:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:00:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:00:54,133 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 15:00:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 15:00:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 15:00:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 15:00:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 15:00:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 15:00:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 15:00:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:00:54,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:00:54,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:00:54,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:00:55,592 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:00:55,592 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 15:00:55,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:00:55 BoogieIcfgContainer [2020-10-13 15:00:55,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:00:55,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:00:55,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:00:55,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:00:55,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:00:53" (1/3) ... [2020-10-13 15:00:55,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1623f671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:00:55, skipping insertion in model container [2020-10-13 15:00:55,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:00:53" (2/3) ... [2020-10-13 15:00:55,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1623f671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:00:55, skipping insertion in model container [2020-10-13 15:00:55,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:00:55" (3/3) ... [2020-10-13 15:00:55,617 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 15:00:55,630 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:00:55,643 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:00:55,658 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:00:55,693 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:00:55,693 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:00:55,693 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:00:55,693 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:00:55,694 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:00:55,694 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:00:55,694 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:00:55,694 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:00:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states. [2020-10-13 15:00:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 15:00:55,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:55,738 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 15:00:55,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash -743554307, now seen corresponding path program 1 times [2020-10-13 15:00:55,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:55,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300324450] [2020-10-13 15:00:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:56,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:01,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:01,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 15:01:01,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:01:01,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 15:01:01,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 15:01:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:01:01,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 15:01:01,893 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:01:01,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:01,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:01,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:01,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:01,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 15:01:01,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:01,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:01,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:01,983 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 15:01:01,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300324450] [2020-10-13 15:01:01,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:01,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:01,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290017362] [2020-10-13 15:01:01,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:01,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:02,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:02,014 INFO L87 Difference]: Start difference. First operand 343 states. Second operand 4 states. [2020-10-13 15:01:02,522 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:01:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:04,769 INFO L93 Difference]: Finished difference Result 647 states and 1107 transitions. [2020-10-13 15:01:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:04,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-13 15:01:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:04,797 INFO L225 Difference]: With dead ends: 647 [2020-10-13 15:01:04,798 INFO L226 Difference]: Without dead ends: 481 [2020-10-13 15:01:04,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-13 15:01:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2020-10-13 15:01:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-13 15:01:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 793 transitions. [2020-10-13 15:01:04,891 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 793 transitions. Word has length 110 [2020-10-13 15:01:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:04,892 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 793 transitions. [2020-10-13 15:01:04,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 793 transitions. [2020-10-13 15:01:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 15:01:04,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:04,900 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 15:01:04,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:01:04,901 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1060059620, now seen corresponding path program 1 times [2020-10-13 15:01:04,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:04,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713269483] [2020-10-13 15:01:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:05,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:05,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:05,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:10,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 15:01:10,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:01:10,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 15:01:10,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 15:01:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:01:10,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:01:10,420 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:01:10,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:10,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:10,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:10,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:10,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 15:01:10,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:10,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:10,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:10,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:10,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:01:10,512 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 15:01:10,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713269483] [2020-10-13 15:01:10,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:10,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:10,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239081917] [2020-10-13 15:01:10,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:10,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:10,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:10,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:10,518 INFO L87 Difference]: Start difference. First operand 478 states and 793 transitions. Second operand 4 states. [2020-10-13 15:01:10,893 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:01:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:12,765 INFO L93 Difference]: Finished difference Result 1044 states and 1733 transitions. [2020-10-13 15:01:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:12,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-13 15:01:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:12,771 INFO L225 Difference]: With dead ends: 1044 [2020-10-13 15:01:12,772 INFO L226 Difference]: Without dead ends: 751 [2020-10-13 15:01:12,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-10-13 15:01:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 747. [2020-10-13 15:01:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-10-13 15:01:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1238 transitions. [2020-10-13 15:01:12,854 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1238 transitions. Word has length 113 [2020-10-13 15:01:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:12,855 INFO L479 AbstractCegarLoop]: Abstraction has 747 states and 1238 transitions. [2020-10-13 15:01:12,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1238 transitions. [2020-10-13 15:01:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 15:01:12,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:12,860 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, 1, 1, 1] [2020-10-13 15:01:12,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:01:12,861 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash 572451526, now seen corresponding path program 1 times [2020-10-13 15:01:12,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:12,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494504550] [2020-10-13 15:01:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:12,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:17,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 15:01:17,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:01:17,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 15:01:17,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:17,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:17,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-13 15:01:17,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 15:01:17,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:18,385 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:01:18,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:18,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:18,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:18,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:18,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:18,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 15:01:18,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:18,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:18,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:18,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:18,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:18,458 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 15:01:18,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494504550] [2020-10-13 15:01:18,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:18,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:18,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298797515] [2020-10-13 15:01:18,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:18,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:18,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:18,464 INFO L87 Difference]: Start difference. First operand 747 states and 1238 transitions. Second operand 4 states. [2020-10-13 15:01:18,876 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:01:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:20,694 INFO L93 Difference]: Finished difference Result 1831 states and 3032 transitions. [2020-10-13 15:01:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:20,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-13 15:01:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:20,703 INFO L225 Difference]: With dead ends: 1831 [2020-10-13 15:01:20,704 INFO L226 Difference]: Without dead ends: 1269 [2020-10-13 15:01:20,706 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 15:01:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2020-10-13 15:01:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1263. [2020-10-13 15:01:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1263 states. [2020-10-13 15:01:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 2086 transitions. [2020-10-13 15:01:20,766 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 2086 transitions. Word has length 116 [2020-10-13 15:01:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:20,767 INFO L479 AbstractCegarLoop]: Abstraction has 1263 states and 2086 transitions. [2020-10-13 15:01:20,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 2086 transitions. [2020-10-13 15:01:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 15:01:20,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:20,770 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, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:20,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:01:20,770 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:20,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1401297227, now seen corresponding path program 1 times [2020-10-13 15:01:20,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:20,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642444197] [2020-10-13 15:01:20,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:20,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:21,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:21,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:22,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:22,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:22,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:25,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 15:01:25,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:01:25,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 15:01:25,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 15:01:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 15:01:25,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:26,393 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:01:26,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:26,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:26,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:26,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 15:01:26,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:26,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:26,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:01:26,490 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 15:01:26,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642444197] [2020-10-13 15:01:26,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:26,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:26,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93009190] [2020-10-13 15:01:26,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:26,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:26,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:26,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:26,493 INFO L87 Difference]: Start difference. First operand 1263 states and 2086 transitions. Second operand 4 states. [2020-10-13 15:01:27,075 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:01:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:28,973 INFO L93 Difference]: Finished difference Result 3339 states and 5504 transitions. [2020-10-13 15:01:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:28,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-10-13 15:01:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:28,988 INFO L225 Difference]: With dead ends: 3339 [2020-10-13 15:01:28,989 INFO L226 Difference]: Without dead ends: 2261 [2020-10-13 15:01:28,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2020-10-13 15:01:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 2251. [2020-10-13 15:01:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2251 states. [2020-10-13 15:01:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 3698 transitions. [2020-10-13 15:01:29,107 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 3698 transitions. Word has length 119 [2020-10-13 15:01:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:29,108 INFO L479 AbstractCegarLoop]: Abstraction has 2251 states and 3698 transitions. [2020-10-13 15:01:29,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 3698 transitions. [2020-10-13 15:01:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 15:01:29,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:29,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:29,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:01:29,111 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1173672613, now seen corresponding path program 1 times [2020-10-13 15:01:29,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:29,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656014440] [2020-10-13 15:01:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:29,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:29,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:29,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:29,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:34,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 15:01:34,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:01:34,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 15:01:34,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:01:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 15:01:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 15:01:34,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:34,667 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:01:34,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:34,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:34,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:34,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:34,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 15:01:34,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:34,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:34,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:34,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:34,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:34,733 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 15:01:34,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656014440] [2020-10-13 15:01:34,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:34,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:01:34,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092148573] [2020-10-13 15:01:34,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:01:34,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:01:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:01:34,736 INFO L87 Difference]: Start difference. First operand 2251 states and 3698 transitions. Second operand 7 states. [2020-10-13 15:01:35,182 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2020-10-13 15:01:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:37,507 INFO L93 Difference]: Finished difference Result 11831 states and 19562 transitions. [2020-10-13 15:01:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:01:37,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-13 15:01:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:37,575 INFO L225 Difference]: With dead ends: 11831 [2020-10-13 15:01:37,575 INFO L226 Difference]: Without dead ends: 9765 [2020-10-13 15:01:37,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:01:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2020-10-13 15:01:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 4181. [2020-10-13 15:01:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4181 states. [2020-10-13 15:01:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 6865 transitions. [2020-10-13 15:01:37,961 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 6865 transitions. Word has length 122 [2020-10-13 15:01:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:37,962 INFO L479 AbstractCegarLoop]: Abstraction has 4181 states and 6865 transitions. [2020-10-13 15:01:37,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:01:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 6865 transitions. [2020-10-13 15:01:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 15:01:37,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:37,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:37,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:01:37,968 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2090280929, now seen corresponding path program 1 times [2020-10-13 15:01:37,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:37,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959452844] [2020-10-13 15:01:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:38,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:40,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:40,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:43,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:43,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 15:01:43,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:01:43,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 15:01:43,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:43,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 15:01:43,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 15:01:43,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:43,592 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:01:43,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:43,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:43,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:43,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:43,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:43,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 15:01:43,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:43,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:43,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:43,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:43,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:43,660 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 15:01:43,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959452844] [2020-10-13 15:01:43,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:43,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:43,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845942894] [2020-10-13 15:01:43,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:43,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:43,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:43,665 INFO L87 Difference]: Start difference. First operand 4181 states and 6865 transitions. Second operand 5 states. [2020-10-13 15:01:44,050 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:01:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:46,091 INFO L93 Difference]: Finished difference Result 12279 states and 20253 transitions. [2020-10-13 15:01:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:01:46,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2020-10-13 15:01:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:46,134 INFO L225 Difference]: With dead ends: 12279 [2020-10-13 15:01:46,134 INFO L226 Difference]: Without dead ends: 8283 [2020-10-13 15:01:46,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:01:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2020-10-13 15:01:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 6215. [2020-10-13 15:01:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6215 states. [2020-10-13 15:01:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6215 states to 6215 states and 10218 transitions. [2020-10-13 15:01:46,599 INFO L78 Accepts]: Start accepts. Automaton has 6215 states and 10218 transitions. Word has length 123 [2020-10-13 15:01:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:46,600 INFO L479 AbstractCegarLoop]: Abstraction has 6215 states and 10218 transitions. [2020-10-13 15:01:46,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6215 states and 10218 transitions. [2020-10-13 15:01:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 15:01:46,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:46,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:46,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:01:46,607 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -435809630, now seen corresponding path program 1 times [2020-10-13 15:01:46,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:46,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908823749] [2020-10-13 15:01:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:46,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:46,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:46,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:46,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:47,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:51,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 15:01:51,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:52,067 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:01:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:52,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:52,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:52,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:52,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:01:52,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:52,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:52,115 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 15:01:52,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908823749] [2020-10-13 15:01:52,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:52,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:52,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005428607] [2020-10-13 15:01:52,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:52,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:52,117 INFO L87 Difference]: Start difference. First operand 6215 states and 10218 transitions. Second operand 5 states. [2020-10-13 15:01:52,528 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:01:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:54,579 INFO L93 Difference]: Finished difference Result 18277 states and 30113 transitions. [2020-10-13 15:01:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:01:54,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-13 15:01:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:54,614 INFO L225 Difference]: With dead ends: 18277 [2020-10-13 15:01:54,615 INFO L226 Difference]: Without dead ends: 12247 [2020-10-13 15:01:54,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:01:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12247 states. [2020-10-13 15:01:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 9207. [2020-10-13 15:01:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9207 states. [2020-10-13 15:01:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9207 states to 9207 states and 15120 transitions. [2020-10-13 15:01:55,132 INFO L78 Accepts]: Start accepts. Automaton has 9207 states and 15120 transitions. Word has length 124 [2020-10-13 15:01:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:55,133 INFO L479 AbstractCegarLoop]: Abstraction has 9207 states and 15120 transitions. [2020-10-13 15:01:55,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 9207 states and 15120 transitions. [2020-10-13 15:01:55,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 15:01:55,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:55,139 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:55,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:01:55,139 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash -682248890, now seen corresponding path program 1 times [2020-10-13 15:01:55,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:55,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559871286] [2020-10-13 15:01:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:55,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:55,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:55,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:00,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:00,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 15:02:00,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:02:00,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:02:00,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-13 15:02:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 15:02:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:00,655 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:02:00,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:00,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:00,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:00,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:00,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:00,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:02:00,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:00,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:00,691 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 15:02:00,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559871286] [2020-10-13 15:02:00,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:00,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:00,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102330186] [2020-10-13 15:02:00,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:00,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:00,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:00,694 INFO L87 Difference]: Start difference. First operand 9207 states and 15120 transitions. Second operand 5 states. [2020-10-13 15:02:01,107 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:02:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:03,309 INFO L93 Difference]: Finished difference Result 27101 states and 44601 transitions. [2020-10-13 15:02:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:02:03,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-13 15:02:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:03,357 INFO L225 Difference]: With dead ends: 27101 [2020-10-13 15:02:03,357 INFO L226 Difference]: Without dead ends: 18079 [2020-10-13 15:02:03,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:02:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2020-10-13 15:02:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 13609. [2020-10-13 15:02:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13609 states. [2020-10-13 15:02:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13609 states to 13609 states and 22324 transitions. [2020-10-13 15:02:04,220 INFO L78 Accepts]: Start accepts. Automaton has 13609 states and 22324 transitions. Word has length 125 [2020-10-13 15:02:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:04,220 INFO L479 AbstractCegarLoop]: Abstraction has 13609 states and 22324 transitions. [2020-10-13 15:02:04,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 13609 states and 22324 transitions. [2020-10-13 15:02:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 15:02:04,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:04,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:02:04,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:02:04,229 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1089045622, now seen corresponding path program 1 times [2020-10-13 15:02:04,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:04,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261766710] [2020-10-13 15:02:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:04,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:04,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:04,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:04,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:04,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:09,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 15:02:09,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:09,673 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:02:09,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:09,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:09,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:09,711 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 15:02:09,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261766710] [2020-10-13 15:02:09,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:09,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:02:09,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386621995] [2020-10-13 15:02:09,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:02:09,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:09,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:02:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:09,713 INFO L87 Difference]: Start difference. First operand 13609 states and 22324 transitions. Second operand 4 states. [2020-10-13 15:02:10,120 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:02:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:12,612 INFO L93 Difference]: Finished difference Result 27671 states and 45361 transitions. [2020-10-13 15:02:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:12,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-10-13 15:02:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:12,666 INFO L225 Difference]: With dead ends: 27671 [2020-10-13 15:02:12,666 INFO L226 Difference]: Without dead ends: 20135 [2020-10-13 15:02:12,688 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 15:02:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20135 states. [2020-10-13 15:02:13,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20135 to 20133. [2020-10-13 15:02:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20133 states. [2020-10-13 15:02:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20133 states to 20133 states and 32865 transitions. [2020-10-13 15:02:13,826 INFO L78 Accepts]: Start accepts. Automaton has 20133 states and 32865 transitions. Word has length 126 [2020-10-13 15:02:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:13,826 INFO L479 AbstractCegarLoop]: Abstraction has 20133 states and 32865 transitions. [2020-10-13 15:02:13,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:02:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20133 states and 32865 transitions. [2020-10-13 15:02:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 15:02:13,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:13,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:13,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:02:13,833 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash 272626665, now seen corresponding path program 1 times [2020-10-13 15:02:13,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:13,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651528027] [2020-10-13 15:02:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:13,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:14,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:14,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:16,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:16,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:16,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:18,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:18,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 15:02:18,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:02:18,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 15:02:18,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:18,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:18,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 15:02:18,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 15:02:18,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:19,282 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:02:19,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:19,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:19,490 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 15:02:19,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651528027] [2020-10-13 15:02:19,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:19,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:19,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289235615] [2020-10-13 15:02:19,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:19,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:19,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:19,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:19,492 INFO L87 Difference]: Start difference. First operand 20133 states and 32865 transitions. Second operand 5 states. [2020-10-13 15:02:19,908 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:02:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:22,867 INFO L93 Difference]: Finished difference Result 62137 states and 101748 transitions. [2020-10-13 15:02:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:02:22,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-13 15:02:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:22,958 INFO L225 Difference]: With dead ends: 62137 [2020-10-13 15:02:22,958 INFO L226 Difference]: Without dead ends: 42953 [2020-10-13 15:02:23,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:02:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2020-10-13 15:02:25,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 31495. [2020-10-13 15:02:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31495 states. [2020-10-13 15:02:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31495 states to 31495 states and 51377 transitions. [2020-10-13 15:02:25,631 INFO L78 Accepts]: Start accepts. Automaton has 31495 states and 51377 transitions. Word has length 126 [2020-10-13 15:02:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:25,631 INFO L479 AbstractCegarLoop]: Abstraction has 31495 states and 51377 transitions. [2020-10-13 15:02:25,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 31495 states and 51377 transitions. [2020-10-13 15:02:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 15:02:25,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:25,638 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:25,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:02:25,638 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1237822874, now seen corresponding path program 1 times [2020-10-13 15:02:25,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:25,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213489112] [2020-10-13 15:02:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:25,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:26,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:30,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:30,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 15:02:30,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:02:30,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:02:30,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:02:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-13 15:02:30,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 15:02:30,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:31,093 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:02:31,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:31,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:31,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:31,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:31,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:02:31,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:31,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:31,129 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 15:02:31,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213489112] [2020-10-13 15:02:31,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:31,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:02:31,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291320885] [2020-10-13 15:02:31,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:02:31,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:31,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:02:31,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:31,131 INFO L87 Difference]: Start difference. First operand 31495 states and 51377 transitions. Second operand 4 states. [2020-10-13 15:02:31,547 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:02:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:35,058 INFO L93 Difference]: Finished difference Result 68997 states and 112735 transitions. [2020-10-13 15:02:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:35,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-10-13 15:02:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:35,139 INFO L225 Difference]: With dead ends: 68997 [2020-10-13 15:02:35,139 INFO L226 Difference]: Without dead ends: 47347 [2020-10-13 15:02:35,194 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 15:02:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2020-10-13 15:02:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 47345. [2020-10-13 15:02:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47345 states. [2020-10-13 15:02:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47345 states to 47345 states and 77053 transitions. [2020-10-13 15:02:37,289 INFO L78 Accepts]: Start accepts. Automaton has 47345 states and 77053 transitions. Word has length 126 [2020-10-13 15:02:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:37,289 INFO L479 AbstractCegarLoop]: Abstraction has 47345 states and 77053 transitions. [2020-10-13 15:02:37,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:02:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 47345 states and 77053 transitions. [2020-10-13 15:02:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 15:02:37,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:37,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:37,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:02:37,292 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash 532775574, now seen corresponding path program 1 times [2020-10-13 15:02:37,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:37,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841643496] [2020-10-13 15:02:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:37,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:37,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:37,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:37,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:42,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:42,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 15:02:42,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:02:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:02:42,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:02:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 15:02:42,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 15:02:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:42,727 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:02:42,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:42,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:42,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:42,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:42,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 15:02:42,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:42,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:42,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:42,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:42,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:42,778 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 15:02:42,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841643496] [2020-10-13 15:02:42,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:42,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:02:42,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79051876] [2020-10-13 15:02:42,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:02:42,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:02:42,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:42,780 INFO L87 Difference]: Start difference. First operand 47345 states and 77053 transitions. Second operand 4 states. [2020-10-13 15:02:43,190 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:02:47,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:47,888 INFO L93 Difference]: Finished difference Result 103861 states and 169199 transitions. [2020-10-13 15:02:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:47,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-10-13 15:02:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:48,006 INFO L225 Difference]: With dead ends: 103861 [2020-10-13 15:02:48,007 INFO L226 Difference]: Without dead ends: 70863 [2020-10-13 15:02:48,052 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 15:02:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70863 states. [2020-10-13 15:02:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70863 to 70861. [2020-10-13 15:02:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70861 states. [2020-10-13 15:02:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70861 states to 70861 states and 114911 transitions. [2020-10-13 15:02:50,952 INFO L78 Accepts]: Start accepts. Automaton has 70861 states and 114911 transitions. Word has length 126 [2020-10-13 15:02:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:50,953 INFO L479 AbstractCegarLoop]: Abstraction has 70861 states and 114911 transitions. [2020-10-13 15:02:50,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:02:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 70861 states and 114911 transitions. [2020-10-13 15:02:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 15:02:50,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:50,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:50,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:02:50,956 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1827754074, now seen corresponding path program 1 times [2020-10-13 15:02:50,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:50,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120749058] [2020-10-13 15:02:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:51,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:51,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:51,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:52,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:52,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:52,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:52,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:56,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:56,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 15:02:56,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:02:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5185 [2020-10-13 15:02:56,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:02:56,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 15:02:56,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 15:02:56,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:56,933 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:02:56,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:56,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:56,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:56,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:56,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:56,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:02:56,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:56,980 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 15:02:56,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120749058] [2020-10-13 15:02:56,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:56,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:02:56,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202184225] [2020-10-13 15:02:56,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:02:56,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:02:56,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:56,982 INFO L87 Difference]: Start difference. First operand 70861 states and 114911 transitions. Second operand 4 states. [2020-10-13 15:02:57,398 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-10-13 15:03:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:03:03,286 INFO L93 Difference]: Finished difference Result 156074 states and 254321 transitions. [2020-10-13 15:03:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:03:03,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-10-13 15:03:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:03:03,524 INFO L225 Difference]: With dead ends: 156074 [2020-10-13 15:03:03,525 INFO L226 Difference]: Without dead ends: 105859 [2020-10-13 15:03:03,613 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 15:03:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105859 states. [2020-10-13 15:03:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105859 to 105857. [2020-10-13 15:03:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105857 states. [2020-10-13 15:03:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105857 states to 105857 states and 171361 transitions. [2020-10-13 15:03:10,554 INFO L78 Accepts]: Start accepts. Automaton has 105857 states and 171361 transitions. Word has length 126 [2020-10-13 15:03:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:03:10,554 INFO L479 AbstractCegarLoop]: Abstraction has 105857 states and 171361 transitions. [2020-10-13 15:03:10,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:03:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 105857 states and 171361 transitions. [2020-10-13 15:03:10,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 15:03:10,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:03:10,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:03:10,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 15:03:10,555 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:03:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:03:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1488409447, now seen corresponding path program 1 times [2020-10-13 15:03:10,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:03:10,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776522723] [2020-10-13 15:03:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:03:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:10,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:10,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:10,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:11,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:11,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:11,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:12,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:12,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:15,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:15,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 15:03:15,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:03:15,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:03:15,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:15,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:03:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:03:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 15:03:15,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:16,122 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:03:16,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:03:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:16,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:16,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:16,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:03:16,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:03:16,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 15:03:16,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:03:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:03:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:03:16,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:16,197 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 15:03:16,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776522723] [2020-10-13 15:03:16,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:03:16,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:03:16,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36480500] [2020-10-13 15:03:16,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:03:16,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:03:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:03:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:03:16,199 INFO L87 Difference]: Start difference. First operand 105857 states and 171361 transitions. Second operand 5 states. [2020-10-13 15:03:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:03:30,616 INFO L93 Difference]: Finished difference Result 313549 states and 507452 transitions. [2020-10-13 15:03:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:03:30,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-13 15:03:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:03:30,959 INFO L225 Difference]: With dead ends: 313549 [2020-10-13 15:03:30,959 INFO L226 Difference]: Without dead ends: 207743 [2020-10-13 15:03:31,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:03:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207743 states. [2020-10-13 15:03:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207743 to 207741. [2020-10-13 15:03:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207741 states. [2020-10-13 15:03:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207741 states to 207741 states and 335005 transitions. [2020-10-13 15:03:45,525 INFO L78 Accepts]: Start accepts. Automaton has 207741 states and 335005 transitions. Word has length 128 [2020-10-13 15:03:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:03:45,526 INFO L479 AbstractCegarLoop]: Abstraction has 207741 states and 335005 transitions. [2020-10-13 15:03:45,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:03:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 207741 states and 335005 transitions. [2020-10-13 15:03:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 15:03:45,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:03:45,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:03:45,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 15:03:45,527 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:03:45,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:03:45,528 INFO L82 PathProgramCache]: Analyzing trace with hash 689699305, now seen corresponding path program 1 times [2020-10-13 15:03:45,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:03:45,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640115389] [2020-10-13 15:03:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:03:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:45,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:45,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:50,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 15:03:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:50,982 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-10-13 15:03:50,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:03:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:50,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:50,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:51,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:03:51,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:03:51,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:03:51,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:03:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:03:51,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:03:51,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:51,029 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 15:03:51,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640115389] [2020-10-13 15:03:51,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:03:51,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:03:51,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203381349] [2020-10-13 15:03:51,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:03:51,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:03:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:03:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:03:51,031 INFO L87 Difference]: Start difference. First operand 207741 states and 335005 transitions. Second operand 4 states. [2020-10-13 15:04:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:04:07,963 INFO L93 Difference]: Finished difference Result 500822 states and 811044 transitions. [2020-10-13 15:04:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:04:07,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-13 15:04:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:04:08,440 INFO L225 Difference]: With dead ends: 500822 [2020-10-13 15:04:08,440 INFO L226 Difference]: Without dead ends: 293457 [2020-10-13 15:04:08,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:04:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293457 states.