/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:56:42,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:56:42,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:56:42,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:56:42,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:56:42,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:56:42,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:56:42,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:56:42,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:56:42,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:56:42,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:56:42,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:56:42,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:56:42,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:56:42,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:56:42,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:56:42,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:56:42,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:56:42,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:56:42,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:56:42,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:56:42,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:56:42,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:56:42,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:56:42,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:56:42,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:56:42,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:56:42,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:56:42,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:56:42,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:56:42,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:56:42,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:56:42,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:56:42,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:56:42,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:56:42,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:56:42,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:56:42,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:56:42,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:56:42,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:56:42,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:56:42,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:56:42,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:56:42,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:56:42,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:56:42,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:56:42,962 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:56:42,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:56:42,963 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:56:42,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:56:42,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:56:42,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:56:42,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:56:42,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:56:42,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:56:42,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:56:42,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:56:42,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:56:42,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:56:42,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:56:42,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:56:42,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:56:42,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:56:42,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:56:42,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:56:42,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:56:42,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:56:42,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:56:42,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:56:42,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:56:42,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:56:42,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:56:43,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:56:43,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:56:43,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:56:43,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:56:43,263 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:56:43,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:56:43,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a82eb7a57/a723af806a76411e8515856a97d93777/FLAGd0728d54d [2020-10-13 14:56:43,829 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:56:43,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:56:43,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a82eb7a57/a723af806a76411e8515856a97d93777/FLAGd0728d54d [2020-10-13 14:56:44,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a82eb7a57/a723af806a76411e8515856a97d93777 [2020-10-13 14:56:44,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:56:44,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:56:44,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:44,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:56:44,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:56:44,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a18185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44, skipping insertion in model container [2020-10-13 14:56:44,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:56:44,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:56:44,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:44,568 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:56:44,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:56:44,787 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:56:44,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44 WrapperNode [2020-10-13 14:56:44,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:56:44,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:56:44,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:56:44,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:56:44,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... [2020-10-13 14:56:44,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:56:44,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:56:44,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:56:44,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:56:44,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:56:44,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:56:44,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:56:44,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:56:44,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:56:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:56:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:56:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:56:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:56:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:56:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:56:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:56:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:56:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:56:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:56:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:56:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:56:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:56:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:56:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:56:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:56:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:56:45,727 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:56:45,727 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:56:45,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:45 BoogieIcfgContainer [2020-10-13 14:56:45,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:56:45,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:56:45,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:56:45,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:56:45,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:56:44" (1/3) ... [2020-10-13 14:56:45,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab12bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:45, skipping insertion in model container [2020-10-13 14:56:45,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:56:44" (2/3) ... [2020-10-13 14:56:45,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab12bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:56:45, skipping insertion in model container [2020-10-13 14:56:45,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:56:45" (3/3) ... [2020-10-13 14:56:45,742 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:56:45,755 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:56:45,763 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:56:45,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:56:45,806 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:56:45,807 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:56:45,807 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:56:45,807 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:56:45,808 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:56:45,808 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:56:45,808 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:56:45,808 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:56:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-10-13 14:56:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:56:45,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:45,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:45,848 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1725986399, now seen corresponding path program 1 times [2020-10-13 14:56:45,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:45,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11840225] [2020-10-13 14:56:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:46,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:48,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:48,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:56:48,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:56:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2100 [2020-10-13 14:56:48,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:56:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:56:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:56:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:56:48,708 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:48,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:48,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:48,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:48,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:48,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:48,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:56:48,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:48,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:48,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:56:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:48,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11840225] [2020-10-13 14:56:48,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:48,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:56:48,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182711621] [2020-10-13 14:56:48,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:56:48,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:48,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:56:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:56:48,821 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 6 states. [2020-10-13 14:56:49,160 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:56:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:50,227 INFO L93 Difference]: Finished difference Result 746 states and 1238 transitions. [2020-10-13 14:56:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:56:50,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:56:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:50,257 INFO L225 Difference]: With dead ends: 746 [2020-10-13 14:56:50,257 INFO L226 Difference]: Without dead ends: 631 [2020-10-13 14:56:50,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:56:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-13 14:56:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 249. [2020-10-13 14:56:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 14:56:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 392 transitions. [2020-10-13 14:56:50,364 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 392 transitions. Word has length 66 [2020-10-13 14:56:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:50,366 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 392 transitions. [2020-10-13 14:56:50,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:56:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 392 transitions. [2020-10-13 14:56:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:56:50,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:50,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:50,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:56:50,374 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1904360380, now seen corresponding path program 1 times [2020-10-13 14:56:50,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:50,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982767126] [2020-10-13 14:56:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:50,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:50,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:51,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:52,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:52,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:56:52,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:52,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2523 [2020-10-13 14:56:52,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:56:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:56:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:56:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:53,352 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:53,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:53,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:53,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:53,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:56:53,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:53,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982767126] [2020-10-13 14:56:53,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:53,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:56:53,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680004654] [2020-10-13 14:56:53,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:56:53,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:56:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:56:53,418 INFO L87 Difference]: Start difference. First operand 249 states and 392 transitions. Second operand 7 states. [2020-10-13 14:56:53,777 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-13 14:56:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:55,135 INFO L93 Difference]: Finished difference Result 1585 states and 2595 transitions. [2020-10-13 14:56:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:56:55,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-13 14:56:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:55,145 INFO L225 Difference]: With dead ends: 1585 [2020-10-13 14:56:55,145 INFO L226 Difference]: Without dead ends: 1397 [2020-10-13 14:56:55,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:56:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-10-13 14:56:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 742. [2020-10-13 14:56:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-10-13 14:56:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1205 transitions. [2020-10-13 14:56:55,218 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1205 transitions. Word has length 67 [2020-10-13 14:56:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:55,219 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 1205 transitions. [2020-10-13 14:56:55,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:56:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1205 transitions. [2020-10-13 14:56:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:56:55,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:55,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:55,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:56:55,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1151422778, now seen corresponding path program 1 times [2020-10-13 14:56:55,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:55,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250547892] [2020-10-13 14:56:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:55,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:57,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:57,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:56:57,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:56:57,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-13 14:56:57,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:57,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:57,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:56:57,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:56:57,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:57,547 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:56:57,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:57,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:57,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:57,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:57,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:57,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:56:57,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250547892] [2020-10-13 14:56:57,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:57,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:57,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815260240] [2020-10-13 14:56:57,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:57,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:57,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:57,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:57,615 INFO L87 Difference]: Start difference. First operand 742 states and 1205 transitions. Second operand 5 states. [2020-10-13 14:56:57,802 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:56:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:58,663 INFO L93 Difference]: Finished difference Result 2611 states and 4294 transitions. [2020-10-13 14:56:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:56:58,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 14:56:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:58,676 INFO L225 Difference]: With dead ends: 2611 [2020-10-13 14:56:58,676 INFO L226 Difference]: Without dead ends: 1992 [2020-10-13 14:56:58,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:56:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-10-13 14:56:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1364. [2020-10-13 14:56:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1364 states. [2020-10-13 14:56:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 2229 transitions. [2020-10-13 14:56:58,788 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 2229 transitions. Word has length 68 [2020-10-13 14:56:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:58,788 INFO L479 AbstractCegarLoop]: Abstraction has 1364 states and 2229 transitions. [2020-10-13 14:56:58,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 2229 transitions. [2020-10-13 14:56:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:56:58,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:58,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:58,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:56:58,791 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1386862141, now seen corresponding path program 1 times [2020-10-13 14:56:58,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:58,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146825541] [2020-10-13 14:56:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:58,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:59,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:00,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:00,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:57:00,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:57:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2026 [2020-10-13 14:57:00,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:57:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:57:00,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:01,045 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:01,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:01,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:01,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:01,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:01,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:57:01,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:01,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:01,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:01,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:01,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:01,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146825541] [2020-10-13 14:57:01,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:01,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:01,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179183037] [2020-10-13 14:57:01,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:01,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:01,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:01,077 INFO L87 Difference]: Start difference. First operand 1364 states and 2229 transitions. Second operand 5 states. [2020-10-13 14:57:01,281 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:57:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:02,125 INFO L93 Difference]: Finished difference Result 5051 states and 8310 transitions. [2020-10-13 14:57:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:57:02,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 14:57:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:02,146 INFO L225 Difference]: With dead ends: 5051 [2020-10-13 14:57:02,146 INFO L226 Difference]: Without dead ends: 3822 [2020-10-13 14:57:02,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:57:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2020-10-13 14:57:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2577. [2020-10-13 14:57:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2577 states. [2020-10-13 14:57:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4219 transitions. [2020-10-13 14:57:02,338 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4219 transitions. Word has length 69 [2020-10-13 14:57:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:02,338 INFO L479 AbstractCegarLoop]: Abstraction has 2577 states and 4219 transitions. [2020-10-13 14:57:02,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4219 transitions. [2020-10-13 14:57:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:57:02,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:02,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:02,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:57:02,341 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1470676787, now seen corresponding path program 1 times [2020-10-13 14:57:02,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:02,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626323282] [2020-10-13 14:57:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:03,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:57:03,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:57:03,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-13 14:57:03,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:03,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:03,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:57:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:57:03,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:03,740 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:03,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:03,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:03,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:57:03,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:03,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:03,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626323282] [2020-10-13 14:57:03,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:03,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:03,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807497379] [2020-10-13 14:57:03,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:03,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:03,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:03,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:03,783 INFO L87 Difference]: Start difference. First operand 2577 states and 4219 transitions. Second operand 4 states. [2020-10-13 14:57:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:04,664 INFO L93 Difference]: Finished difference Result 6860 states and 11197 transitions. [2020-10-13 14:57:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:04,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 14:57:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:04,688 INFO L225 Difference]: With dead ends: 6860 [2020-10-13 14:57:04,688 INFO L226 Difference]: Without dead ends: 4418 [2020-10-13 14:57:04,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2020-10-13 14:57:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4359. [2020-10-13 14:57:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-10-13 14:57:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 7018 transitions. [2020-10-13 14:57:05,058 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 7018 transitions. Word has length 71 [2020-10-13 14:57:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:05,059 INFO L479 AbstractCegarLoop]: Abstraction has 4359 states and 7018 transitions. [2020-10-13 14:57:05,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 7018 transitions. [2020-10-13 14:57:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:57:05,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:05,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:05,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:57:05,062 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1117229556, now seen corresponding path program 1 times [2020-10-13 14:57:05,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:05,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907164572] [2020-10-13 14:57:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:05,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:06,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:10,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:57:10,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:57:10,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:57:10,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:57:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 14:57:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:10,392 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:10,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:10,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:10,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:10,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:10,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:10,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 14:57:10,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:10,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:10,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:57:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:10,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907164572] [2020-10-13 14:57:10,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:10,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:10,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039101240] [2020-10-13 14:57:10,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:10,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:10,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:10,454 INFO L87 Difference]: Start difference. First operand 4359 states and 7018 transitions. Second operand 5 states. [2020-10-13 14:57:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:11,750 INFO L93 Difference]: Finished difference Result 12321 states and 19831 transitions. [2020-10-13 14:57:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:11,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 14:57:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:11,791 INFO L225 Difference]: With dead ends: 12321 [2020-10-13 14:57:11,791 INFO L226 Difference]: Without dead ends: 8147 [2020-10-13 14:57:11,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8147 states. [2020-10-13 14:57:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8147 to 4579. [2020-10-13 14:57:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4579 states. [2020-10-13 14:57:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 7354 transitions. [2020-10-13 14:57:12,152 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 7354 transitions. Word has length 72 [2020-10-13 14:57:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:12,153 INFO L479 AbstractCegarLoop]: Abstraction has 4579 states and 7354 transitions. [2020-10-13 14:57:12,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 7354 transitions. [2020-10-13 14:57:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:57:12,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:12,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:12,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:57:12,156 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:12,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1781712306, now seen corresponding path program 1 times [2020-10-13 14:57:12,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:12,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200338191] [2020-10-13 14:57:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:12,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:13,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:15,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:15,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:17,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:57:17,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:57:17,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:57:17,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:57:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 14:57:17,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:17,453 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:17,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:17,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:17,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:17,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:17,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:17,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:57:17,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:17,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:17,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200338191] [2020-10-13 14:57:17,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:17,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:17,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90115857] [2020-10-13 14:57:17,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:17,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:17,499 INFO L87 Difference]: Start difference. First operand 4579 states and 7354 transitions. Second operand 4 states. [2020-10-13 14:57:17,791 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:57:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:19,027 INFO L93 Difference]: Finished difference Result 12509 states and 20144 transitions. [2020-10-13 14:57:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:19,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:57:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:19,060 INFO L225 Difference]: With dead ends: 12509 [2020-10-13 14:57:19,060 INFO L226 Difference]: Without dead ends: 8008 [2020-10-13 14:57:19,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2020-10-13 14:57:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 8006. [2020-10-13 14:57:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8006 states. [2020-10-13 14:57:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 12838 transitions. [2020-10-13 14:57:19,544 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 12838 transitions. Word has length 72 [2020-10-13 14:57:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:19,544 INFO L479 AbstractCegarLoop]: Abstraction has 8006 states and 12838 transitions. [2020-10-13 14:57:19,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 12838 transitions. [2020-10-13 14:57:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:57:19,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:19,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:19,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:57:19,547 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -298977637, now seen corresponding path program 1 times [2020-10-13 14:57:19,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:19,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703102997] [2020-10-13 14:57:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:19,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:19,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:24,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:57:24,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:57:24,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 14:57:24,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:24,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:24,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 14:57:24,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 14:57:24,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:24,808 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:24,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:24,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:24,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:24,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:24,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:24,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:24,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:24,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703102997] [2020-10-13 14:57:24,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:24,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:24,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380540296] [2020-10-13 14:57:24,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:24,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:24,843 INFO L87 Difference]: Start difference. First operand 8006 states and 12838 transitions. Second operand 5 states. [2020-10-13 14:57:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:26,373 INFO L93 Difference]: Finished difference Result 22410 states and 35792 transitions. [2020-10-13 14:57:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:26,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 14:57:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:26,408 INFO L225 Difference]: With dead ends: 22410 [2020-10-13 14:57:26,409 INFO L226 Difference]: Without dead ends: 14576 [2020-10-13 14:57:26,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14576 states. [2020-10-13 14:57:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14576 to 14322. [2020-10-13 14:57:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14322 states. [2020-10-13 14:57:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 22606 transitions. [2020-10-13 14:57:26,973 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 22606 transitions. Word has length 72 [2020-10-13 14:57:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:26,973 INFO L479 AbstractCegarLoop]: Abstraction has 14322 states and 22606 transitions. [2020-10-13 14:57:26,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 22606 transitions. [2020-10-13 14:57:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:57:26,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:26,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:26,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:57:26,975 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:26,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:26,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1199623947, now seen corresponding path program 1 times [2020-10-13 14:57:26,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:26,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166333907] [2020-10-13 14:57:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:27,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:27,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:31,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:31,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:57:31,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:57:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:57:31,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 14:57:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:57:31,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:32,212 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:32,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:32,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:32,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:32,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:32,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:32,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:32,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:32,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166333907] [2020-10-13 14:57:32,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:32,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:32,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232095947] [2020-10-13 14:57:32,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:32,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:32,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:32,242 INFO L87 Difference]: Start difference. First operand 14322 states and 22606 transitions. Second operand 4 states. [2020-10-13 14:57:32,530 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:57:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:34,066 INFO L93 Difference]: Finished difference Result 38862 states and 61344 transitions. [2020-10-13 14:57:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:34,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:57:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:34,128 INFO L225 Difference]: With dead ends: 38862 [2020-10-13 14:57:34,129 INFO L226 Difference]: Without dead ends: 24680 [2020-10-13 14:57:34,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24680 states. [2020-10-13 14:57:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24680 to 24638. [2020-10-13 14:57:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24638 states. [2020-10-13 14:57:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24638 states to 24638 states and 38656 transitions. [2020-10-13 14:57:35,414 INFO L78 Accepts]: Start accepts. Automaton has 24638 states and 38656 transitions. Word has length 72 [2020-10-13 14:57:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:35,415 INFO L479 AbstractCegarLoop]: Abstraction has 24638 states and 38656 transitions. [2020-10-13 14:57:35,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 24638 states and 38656 transitions. [2020-10-13 14:57:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:57:35,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:35,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:35,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:57:35,416 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1399973400, now seen corresponding path program 1 times [2020-10-13 14:57:35,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:35,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84817657] [2020-10-13 14:57:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:35,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:35,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:35,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:57:35,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:57:35,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-13 14:57:35,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:57:35,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:57:35,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:36,076 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:36,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:36,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:36,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:36,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:36,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:36,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:36,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84817657] [2020-10-13 14:57:36,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:36,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:36,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825235529] [2020-10-13 14:57:36,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:36,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:36,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:36,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:36,102 INFO L87 Difference]: Start difference. First operand 24638 states and 38656 transitions. Second operand 4 states. [2020-10-13 14:57:36,313 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:57:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:38,105 INFO L93 Difference]: Finished difference Result 53042 states and 83398 transitions. [2020-10-13 14:57:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:38,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:57:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:38,157 INFO L225 Difference]: With dead ends: 53042 [2020-10-13 14:57:38,157 INFO L226 Difference]: Without dead ends: 28492 [2020-10-13 14:57:38,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28492 states. [2020-10-13 14:57:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28492 to 28430. [2020-10-13 14:57:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28430 states. [2020-10-13 14:57:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28430 states to 28430 states and 44547 transitions. [2020-10-13 14:57:40,404 INFO L78 Accepts]: Start accepts. Automaton has 28430 states and 44547 transitions. Word has length 72 [2020-10-13 14:57:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:40,404 INFO L479 AbstractCegarLoop]: Abstraction has 28430 states and 44547 transitions. [2020-10-13 14:57:40,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28430 states and 44547 transitions. [2020-10-13 14:57:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:57:40,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:40,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:40,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:57:40,405 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:40,406 INFO L82 PathProgramCache]: Analyzing trace with hash 84467570, now seen corresponding path program 1 times [2020-10-13 14:57:40,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:40,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615952012] [2020-10-13 14:57:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:40,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:42,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:42,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:57:42,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:57:42,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1878 [2020-10-13 14:57:42,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:42,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:42,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 14:57:42,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 14:57:42,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:42,491 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:42,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:42,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:42,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:42,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:42,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:42,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:42,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:42,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615952012] [2020-10-13 14:57:42,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:42,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:42,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345828168] [2020-10-13 14:57:42,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:42,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:42,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:42,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:42,517 INFO L87 Difference]: Start difference. First operand 28430 states and 44547 transitions. Second operand 4 states. [2020-10-13 14:57:42,719 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:57:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:44,956 INFO L93 Difference]: Finished difference Result 68507 states and 106989 transitions. [2020-10-13 14:57:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:44,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 14:57:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:45,008 INFO L225 Difference]: With dead ends: 68507 [2020-10-13 14:57:45,009 INFO L226 Difference]: Without dead ends: 40157 [2020-10-13 14:57:45,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40157 states. [2020-10-13 14:57:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40157 to 39911. [2020-10-13 14:57:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39911 states. [2020-10-13 14:57:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39911 states to 39911 states and 61816 transitions. [2020-10-13 14:57:46,870 INFO L78 Accepts]: Start accepts. Automaton has 39911 states and 61816 transitions. Word has length 73 [2020-10-13 14:57:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:46,870 INFO L479 AbstractCegarLoop]: Abstraction has 39911 states and 61816 transitions. [2020-10-13 14:57:46,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39911 states and 61816 transitions. [2020-10-13 14:57:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 14:57:46,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:46,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:46,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:57:46,871 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash -908075202, now seen corresponding path program 1 times [2020-10-13 14:57:46,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:46,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649734337] [2020-10-13 14:57:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:46,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:46,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:57:51,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:52,093 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:57:52,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:52,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:52,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:52,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:52,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:52,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:52,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:52,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:52,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:52,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:52,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649734337] [2020-10-13 14:57:52,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:52,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:52,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725944520] [2020-10-13 14:57:52,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:52,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:52,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:52,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:52,116 INFO L87 Difference]: Start difference. First operand 39911 states and 61816 transitions. Second operand 4 states. [2020-10-13 14:57:52,314 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:57:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:55,248 INFO L93 Difference]: Finished difference Result 83905 states and 129670 transitions. [2020-10-13 14:57:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:55,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-13 14:57:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:55,333 INFO L225 Difference]: With dead ends: 83905 [2020-10-13 14:57:55,334 INFO L226 Difference]: Without dead ends: 55554 [2020-10-13 14:57:55,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55554 states. [2020-10-13 14:57:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55554 to 55552. [2020-10-13 14:57:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55552 states. [2020-10-13 14:57:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55552 states to 55552 states and 84728 transitions. [2020-10-13 14:57:58,762 INFO L78 Accepts]: Start accepts. Automaton has 55552 states and 84728 transitions. Word has length 74 [2020-10-13 14:57:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:58,762 INFO L479 AbstractCegarLoop]: Abstraction has 55552 states and 84728 transitions. [2020-10-13 14:57:58,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 55552 states and 84728 transitions. [2020-10-13 14:57:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 14:57:58,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:58,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:58,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:57:58,763 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2006242383, now seen corresponding path program 1 times [2020-10-13 14:57:58,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:58,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740535686] [2020-10-13 14:57:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:58,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:03,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 14:58:03,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:03,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4796 [2020-10-13 14:58:03,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:58:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:58:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:58:03,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:03,812 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:58:03,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:03,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:03,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:03,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:03,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:03,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:03,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:03,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:03,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:03,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:03,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740535686] [2020-10-13 14:58:03,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:03,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:58:03,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863561804] [2020-10-13 14:58:03,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:58:03,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:58:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:03,844 INFO L87 Difference]: Start difference. First operand 55552 states and 84728 transitions. Second operand 6 states. [2020-10-13 14:58:04,090 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:58:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:09,104 INFO L93 Difference]: Finished difference Result 162269 states and 247828 transitions. [2020-10-13 14:58:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:58:09,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-13 14:58:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:09,254 INFO L225 Difference]: With dead ends: 162269 [2020-10-13 14:58:09,254 INFO L226 Difference]: Without dead ends: 106796 [2020-10-13 14:58:09,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:58:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106796 states. [2020-10-13 14:58:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106796 to 55552. [2020-10-13 14:58:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55552 states. [2020-10-13 14:58:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55552 states to 55552 states and 84500 transitions. [2020-10-13 14:58:12,226 INFO L78 Accepts]: Start accepts. Automaton has 55552 states and 84500 transitions. Word has length 75 [2020-10-13 14:58:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:12,226 INFO L479 AbstractCegarLoop]: Abstraction has 55552 states and 84500 transitions. [2020-10-13 14:58:12,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:58:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 55552 states and 84500 transitions. [2020-10-13 14:58:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 14:58:12,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:12,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:12,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:58:12,227 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1251421511, now seen corresponding path program 1 times [2020-10-13 14:58:12,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:12,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482999621] [2020-10-13 14:58:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 14:58:17,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:17,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:58:17,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:58:17,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 14:58:17,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:58:17,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:17,484 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:58:17,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:17,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:17,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:17,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:17,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:17,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:58:17,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:17,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:17,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:17,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:17,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:17,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482999621] [2020-10-13 14:58:17,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:17,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:58:17,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594611156] [2020-10-13 14:58:17,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:58:17,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:17,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:58:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:17,515 INFO L87 Difference]: Start difference. First operand 55552 states and 84500 transitions. Second operand 6 states. [2020-10-13 14:58:17,767 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:58:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:27,848 INFO L93 Difference]: Finished difference Result 255227 states and 389260 transitions. [2020-10-13 14:58:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:58:27,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-13 14:58:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:28,131 INFO L225 Difference]: With dead ends: 255227 [2020-10-13 14:58:28,131 INFO L226 Difference]: Without dead ends: 199754 [2020-10-13 14:58:28,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:58:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199754 states. [2020-10-13 14:58:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199754 to 103744. [2020-10-13 14:58:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103744 states. [2020-10-13 14:58:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103744 states to 103744 states and 157328 transitions. [2020-10-13 14:58:36,234 INFO L78 Accepts]: Start accepts. Automaton has 103744 states and 157328 transitions. Word has length 78 [2020-10-13 14:58:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:36,234 INFO L479 AbstractCegarLoop]: Abstraction has 103744 states and 157328 transitions. [2020-10-13 14:58:36,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:58:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 103744 states and 157328 transitions. [2020-10-13 14:58:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 14:58:36,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:36,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:36,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:58:36,235 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash -141270450, now seen corresponding path program 1 times [2020-10-13 14:58:36,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:36,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094011894] [2020-10-13 14:58:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:36,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:40,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 14:58:40,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:40,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4085 [2020-10-13 14:58:40,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 14:58:40,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:58:40,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:40,556 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:58:40,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:40,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:40,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:40,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:40,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:58:40,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:40,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:40,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094011894] [2020-10-13 14:58:40,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:40,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:40,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961503845] [2020-10-13 14:58:40,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:40,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:40,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:40,579 INFO L87 Difference]: Start difference. First operand 103744 states and 157328 transitions. Second operand 5 states. [2020-10-13 14:58:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:50,342 INFO L93 Difference]: Finished difference Result 146140 states and 219715 transitions. [2020-10-13 14:58:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:58:50,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-13 14:58:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:50,537 INFO L225 Difference]: With dead ends: 146140 [2020-10-13 14:58:50,538 INFO L226 Difference]: Without dead ends: 146138 [2020-10-13 14:58:50,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146138 states. [2020-10-13 14:58:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146138 to 104560. [2020-10-13 14:58:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104560 states. [2020-10-13 14:58:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104560 states to 104560 states and 158084 transitions. [2020-10-13 14:58:57,132 INFO L78 Accepts]: Start accepts. Automaton has 104560 states and 158084 transitions. Word has length 79 [2020-10-13 14:58:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:57,132 INFO L479 AbstractCegarLoop]: Abstraction has 104560 states and 158084 transitions. [2020-10-13 14:58:57,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 104560 states and 158084 transitions. [2020-10-13 14:58:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:58:57,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:57,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:57,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:58:57,135 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 917047856, now seen corresponding path program 1 times [2020-10-13 14:58:57,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:57,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180725443] [2020-10-13 14:58:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:57,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:58,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:58,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:03,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:03,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:59:03,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:59:03,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6335 [2020-10-13 14:59:03,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:03,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:03,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 14:59:03,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:59:03,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:03,696 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:03,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:03,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:03,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:03,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:03,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:59:03,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:03,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:03,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180725443] [2020-10-13 14:59:03,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:03,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:03,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377109175] [2020-10-13 14:59:03,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:03,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:03,725 INFO L87 Difference]: Start difference. First operand 104560 states and 158084 transitions. Second operand 4 states. [2020-10-13 14:59:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:09,300 INFO L93 Difference]: Finished difference Result 187653 states and 284157 transitions. [2020-10-13 14:59:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:59:09,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-13 14:59:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:09,415 INFO L225 Difference]: With dead ends: 187653 [2020-10-13 14:59:09,415 INFO L226 Difference]: Without dead ends: 83172 [2020-10-13 14:59:09,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83172 states. [2020-10-13 14:59:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83172 to 83170. [2020-10-13 14:59:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83170 states. [2020-10-13 14:59:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83170 states to 83170 states and 125241 transitions. [2020-10-13 14:59:14,650 INFO L78 Accepts]: Start accepts. Automaton has 83170 states and 125241 transitions. Word has length 103 [2020-10-13 14:59:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:14,651 INFO L479 AbstractCegarLoop]: Abstraction has 83170 states and 125241 transitions. [2020-10-13 14:59:14,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 83170 states and 125241 transitions. [2020-10-13 14:59:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:59:14,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:14,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:14,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:59:14,653 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash -508521921, now seen corresponding path program 1 times [2020-10-13 14:59:14,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:14,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850825902] [2020-10-13 14:59:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:14,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:14,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:14,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:14,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:15,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:15,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:16,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:16,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:19,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:19,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:59:19,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:59:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5205 [2020-10-13 14:59:19,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:59:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 14:59:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:20,083 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:20,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:20,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:20,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:20,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:20,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:20,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:59:20,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:20,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:20,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850825902] [2020-10-13 14:59:20,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:20,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:20,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47062581] [2020-10-13 14:59:20,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:20,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:20,108 INFO L87 Difference]: Start difference. First operand 83170 states and 125241 transitions. Second operand 4 states. [2020-10-13 14:59:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:23,136 INFO L93 Difference]: Finished difference Result 119422 states and 179931 transitions. [2020-10-13 14:59:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:59:23,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-13 14:59:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:23,184 INFO L225 Difference]: With dead ends: 119422 [2020-10-13 14:59:23,184 INFO L226 Difference]: Without dead ends: 36397 [2020-10-13 14:59:23,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36397 states. [2020-10-13 14:59:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36397 to 35579. [2020-10-13 14:59:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35579 states. [2020-10-13 14:59:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35579 states to 35579 states and 53451 transitions. [2020-10-13 14:59:25,539 INFO L78 Accepts]: Start accepts. Automaton has 35579 states and 53451 transitions. Word has length 103 [2020-10-13 14:59:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:25,539 INFO L479 AbstractCegarLoop]: Abstraction has 35579 states and 53451 transitions. [2020-10-13 14:59:25,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:25,539 INFO L276 IsEmpty]: Start isEmpty. Operand 35579 states and 53451 transitions. [2020-10-13 14:59:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 14:59:25,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:25,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:25,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:59:25,541 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:25,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:25,542 INFO L82 PathProgramCache]: Analyzing trace with hash 439183408, now seen corresponding path program 1 times [2020-10-13 14:59:25,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:25,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468854456] [2020-10-13 14:59:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:25,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:25,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:25,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:27,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:27,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:30,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:30,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 14:59:30,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:59:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:59:30,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:59:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:59:30,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:30,756 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:30,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:30,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:59:30,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468854456] [2020-10-13 14:59:30,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:30,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:30,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291482114] [2020-10-13 14:59:30,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:30,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:30,783 INFO L87 Difference]: Start difference. First operand 35579 states and 53451 transitions. Second operand 4 states. [2020-10-13 14:59:30,994 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:59:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:34,075 INFO L93 Difference]: Finished difference Result 76272 states and 114752 transitions. [2020-10-13 14:59:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:34,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-13 14:59:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:34,128 INFO L225 Difference]: With dead ends: 76272 [2020-10-13 14:59:34,128 INFO L226 Difference]: Without dead ends: 40801 [2020-10-13 14:59:34,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40801 states. [2020-10-13 14:59:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40801 to 40695. [2020-10-13 14:59:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40695 states. [2020-10-13 14:59:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40695 states to 40695 states and 61138 transitions. [2020-10-13 14:59:36,763 INFO L78 Accepts]: Start accepts. Automaton has 40695 states and 61138 transitions. Word has length 106 [2020-10-13 14:59:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:36,763 INFO L479 AbstractCegarLoop]: Abstraction has 40695 states and 61138 transitions. [2020-10-13 14:59:36,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 40695 states and 61138 transitions. [2020-10-13 14:59:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 14:59:36,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:36,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:36,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:59:36,765 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1840264206, now seen corresponding path program 1 times [2020-10-13 14:59:36,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:36,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250298563] [2020-10-13 14:59:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:36,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:38,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:38,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:41,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 14:59:41,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:59:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:59:41,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:59:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:59:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:42,032 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:42,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:42,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:42,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:42,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:42,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:42,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:42,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:42,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:42,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:42,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:59:42,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250298563] [2020-10-13 14:59:42,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:42,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:42,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003034190] [2020-10-13 14:59:42,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:42,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:42,061 INFO L87 Difference]: Start difference. First operand 40695 states and 61138 transitions. Second operand 5 states. [2020-10-13 14:59:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:48,804 INFO L93 Difference]: Finished difference Result 120403 states and 180537 transitions. [2020-10-13 14:59:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:48,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-13 14:59:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:48,904 INFO L225 Difference]: With dead ends: 120403 [2020-10-13 14:59:48,904 INFO L226 Difference]: Without dead ends: 79737 [2020-10-13 14:59:48,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79737 states. [2020-10-13 14:59:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79737 to 79735. [2020-10-13 14:59:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79735 states. [2020-10-13 14:59:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79735 states to 79735 states and 118741 transitions. [2020-10-13 14:59:55,527 INFO L78 Accepts]: Start accepts. Automaton has 79735 states and 118741 transitions. Word has length 110 [2020-10-13 14:59:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:55,528 INFO L479 AbstractCegarLoop]: Abstraction has 79735 states and 118741 transitions. [2020-10-13 14:59:55,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 79735 states and 118741 transitions. [2020-10-13 14:59:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:59:55,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:55,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:55,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:59:55,531 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2015271324, now seen corresponding path program 1 times [2020-10-13 14:59:55,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:55,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018330090] [2020-10-13 14:59:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:55,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:55,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:55,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:55,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:55,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:58,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:58,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:58,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:00,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 15:00:00,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:00:00,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:00:00,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:00,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:00,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 15:00:00,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 15:00:00,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:00,750 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:00,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:00,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:00,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:00,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:00,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:00:00,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:00,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:00,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:00,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:00,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:00:00,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018330090] [2020-10-13 15:00:00,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:00,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:00,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137533877] [2020-10-13 15:00:00,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:00,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:00,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:00,781 INFO L87 Difference]: Start difference. First operand 79735 states and 118741 transitions. Second operand 4 states. [2020-10-13 15:00:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:14,432 INFO L93 Difference]: Finished difference Result 239159 states and 356151 transitions. [2020-10-13 15:00:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:00:14,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-13 15:00:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:14,646 INFO L225 Difference]: With dead ends: 239159 [2020-10-13 15:00:14,646 INFO L226 Difference]: Without dead ends: 159456 [2020-10-13 15:00:14,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159456 states. [2020-10-13 15:00:21,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159456 to 79737. [2020-10-13 15:00:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79737 states. [2020-10-13 15:00:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79737 states to 79737 states and 118743 transitions. [2020-10-13 15:00:21,704 INFO L78 Accepts]: Start accepts. Automaton has 79737 states and 118743 transitions. Word has length 111 [2020-10-13 15:00:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:21,704 INFO L479 AbstractCegarLoop]: Abstraction has 79737 states and 118743 transitions. [2020-10-13 15:00:21,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 79737 states and 118743 transitions. [2020-10-13 15:00:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 15:00:21,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:21,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:21,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 15:00:21,707 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash -414921677, now seen corresponding path program 1 times [2020-10-13 15:00:21,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:21,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048262744] [2020-10-13 15:00:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:26,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:26,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:26,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 15:00:26,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:00:26,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 15:00:26,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 15:00:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 15:00:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1