/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:48:12,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:48:12,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:48:12,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:48:12,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:48:12,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:48:12,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:48:12,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:48:12,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:48:12,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:48:12,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:48:12,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:48:12,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:48:12,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:48:12,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:48:12,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:48:12,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:48:12,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:48:12,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:48:12,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:48:12,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:48:12,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:48:12,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:48:12,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:48:12,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:48:12,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:48:12,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:48:12,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:48:12,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:48:12,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:48:12,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:48:12,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:48:12,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:48:12,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:48:12,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:48:12,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:48:12,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:48:12,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:48:12,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:48:12,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:48:12,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:48:12,909 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 14:48:12,946 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:48:12,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:48:12,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:48:12,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:48:12,948 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:48:12,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:48:12,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:48:12,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:48:12,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:48:12,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:48:12,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:48:12,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:48:12,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:48:12,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:48:12,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:48:12,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:48:12,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:48:12,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:48:12,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:48:12,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:48:12,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:48:12,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:48:12,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:48:12,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:48:12,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:48:12,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:48:12,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:48:12,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:48:12,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:48:12,954 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 14:48:13,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:48:13,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:48:13,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:48:13,289 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:48:13,291 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:48:13,292 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:48:13,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97c93781c/283c840a972a4596936877acecaf9d0c/FLAG714297eda [2020-10-13 14:48:13,822 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:48:13,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:48:13,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97c93781c/283c840a972a4596936877acecaf9d0c/FLAG714297eda [2020-10-13 14:48:14,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97c93781c/283c840a972a4596936877acecaf9d0c [2020-10-13 14:48:14,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:48:14,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:48:14,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:48:14,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:48:14,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:48:14,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd0a692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14, skipping insertion in model container [2020-10-13 14:48:14,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:48:14,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:48:14,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:48:14,757 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:48:14,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:48:14,933 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:48:14,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14 WrapperNode [2020-10-13 14:48:14,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:48:14,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:48:14,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:48:14,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:48:14,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (1/1) ... [2020-10-13 14:48:14,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:48:14,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:48:14,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:48:14,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:48:14,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (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 14:48:15,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:48:15,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:48:15,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:48:15,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:48:15,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:48:15,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:48:15,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:48:15,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:48:15,061 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:48:15,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:48:15,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:48:15,061 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:48:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:48:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:48:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:48:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:48:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:48:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:48:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:48:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:48:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:48:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:48:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:48:15,850 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:48:15,852 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:48:15,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:48:15 BoogieIcfgContainer [2020-10-13 14:48:15,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:48:15,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:48:15,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:48:15,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:48:15,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:48:14" (1/3) ... [2020-10-13 14:48:15,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731bbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:48:15, skipping insertion in model container [2020-10-13 14:48:15,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:48:14" (2/3) ... [2020-10-13 14:48:15,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731bbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:48:15, skipping insertion in model container [2020-10-13 14:48:15,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:48:15" (3/3) ... [2020-10-13 14:48:15,867 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:48:15,876 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:48:15,884 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:48:15,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:48:15,917 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:48:15,917 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:48:15,917 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:48:15,917 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:48:15,918 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:48:15,918 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:48:15,918 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:48:15,918 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:48:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-10-13 14:48:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:48:15,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:15,951 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] [2020-10-13 14:48:15,952 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1420273055, now seen corresponding path program 1 times [2020-10-13 14:48:15,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:15,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933672262] [2020-10-13 14:48:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:16,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:16,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:16,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:17,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:20,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:20,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:48:20,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:48:20,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4255 [2020-10-13 14:48:20,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:20,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:20,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:48:20,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:48:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:48:20,899 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:20,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:20,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:20,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:20,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:48:20,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:20,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:20,964 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 14:48:20,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933672262] [2020-10-13 14:48:20,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:20,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:48:20,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306266435] [2020-10-13 14:48:20,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:48:20,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:48:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:48:20,996 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 4 states. [2020-10-13 14:48:21,281 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 14:48:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:22,074 INFO L93 Difference]: Finished difference Result 320 states and 511 transitions. [2020-10-13 14:48:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:48:22,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 14:48:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:22,094 INFO L225 Difference]: With dead ends: 320 [2020-10-13 14:48:22,095 INFO L226 Difference]: Without dead ends: 213 [2020-10-13 14:48:22,100 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 14:48:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-13 14:48:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2020-10-13 14:48:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 14:48:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 313 transitions. [2020-10-13 14:48:22,171 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 313 transitions. Word has length 64 [2020-10-13 14:48:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:22,172 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 313 transitions. [2020-10-13 14:48:22,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 313 transitions. [2020-10-13 14:48:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:48:22,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:22,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:22,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:48:22,176 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:22,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1003366964, now seen corresponding path program 1 times [2020-10-13 14:48:22,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:22,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890101365] [2020-10-13 14:48:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:22,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:22,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:22,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:23,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:23,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:48:23,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:48:23,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1695 [2020-10-13 14:48:23,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:48:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:48:23,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:24,166 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:24,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:24,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:24,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:24,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:24,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:24,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:48:24,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:24,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:24,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:24,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:24,219 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 14:48:24,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890101365] [2020-10-13 14:48:24,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:24,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:48:24,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990771512] [2020-10-13 14:48:24,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:48:24,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:24,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:48:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:48:24,225 INFO L87 Difference]: Start difference. First operand 211 states and 313 transitions. Second operand 4 states. [2020-10-13 14:48:24,427 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 14:48:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:25,251 INFO L93 Difference]: Finished difference Result 523 states and 809 transitions. [2020-10-13 14:48:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:48:25,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:48:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:25,255 INFO L225 Difference]: With dead ends: 523 [2020-10-13 14:48:25,256 INFO L226 Difference]: Without dead ends: 351 [2020-10-13 14:48:25,261 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 14:48:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-13 14:48:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2020-10-13 14:48:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-13 14:48:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 532 transitions. [2020-10-13 14:48:25,293 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 532 transitions. Word has length 65 [2020-10-13 14:48:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:25,294 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 532 transitions. [2020-10-13 14:48:25,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 532 transitions. [2020-10-13 14:48:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:48:25,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:25,296 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 14:48:25,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:48:25,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 602037942, now seen corresponding path program 1 times [2020-10-13 14:48:25,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:25,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129192863] [2020-10-13 14:48:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:25,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:26,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:26,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:48:26,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:26,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-13 14:48:26,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:26,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:48:26,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:48:26,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:48:26,406 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:26,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:26,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:26,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:26,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:48:26,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:26,449 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 14:48:26,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129192863] [2020-10-13 14:48:26,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:26,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:48:26,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191067201] [2020-10-13 14:48:26,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:48:26,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:48:26,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:48:26,454 INFO L87 Difference]: Start difference. First operand 349 states and 532 transitions. Second operand 4 states. [2020-10-13 14:48:26,686 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 14:48:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:27,350 INFO L93 Difference]: Finished difference Result 905 states and 1414 transitions. [2020-10-13 14:48:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:48:27,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:48:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:27,357 INFO L225 Difference]: With dead ends: 905 [2020-10-13 14:48:27,357 INFO L226 Difference]: Without dead ends: 595 [2020-10-13 14:48:27,363 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 14:48:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-13 14:48:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2020-10-13 14:48:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2020-10-13 14:48:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 916 transitions. [2020-10-13 14:48:27,425 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 916 transitions. Word has length 66 [2020-10-13 14:48:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:27,426 INFO L479 AbstractCegarLoop]: Abstraction has 593 states and 916 transitions. [2020-10-13 14:48:27,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 916 transitions. [2020-10-13 14:48:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:48:27,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:27,439 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 14:48:27,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:48:27,440 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2135158247, now seen corresponding path program 1 times [2020-10-13 14:48:27,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:27,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068593616] [2020-10-13 14:48:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:27,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:27,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:48:27,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:27,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-13 14:48:27,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:48:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:48:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:28,136 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:28,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:28,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:28,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:28,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:48:28,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:28,171 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 14:48:28,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068593616] [2020-10-13 14:48:28,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:28,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:48:28,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195695306] [2020-10-13 14:48:28,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:48:28,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:28,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:48:28,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:48:28,175 INFO L87 Difference]: Start difference. First operand 593 states and 916 transitions. Second operand 4 states. [2020-10-13 14:48:28,358 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 14:48:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:28,963 INFO L93 Difference]: Finished difference Result 1573 states and 2462 transitions. [2020-10-13 14:48:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:48:28,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 14:48:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:28,970 INFO L225 Difference]: With dead ends: 1573 [2020-10-13 14:48:28,970 INFO L226 Difference]: Without dead ends: 1019 [2020-10-13 14:48:28,972 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 14:48:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2020-10-13 14:48:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1017. [2020-10-13 14:48:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-10-13 14:48:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1576 transitions. [2020-10-13 14:48:29,021 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1576 transitions. Word has length 67 [2020-10-13 14:48:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:29,022 INFO L479 AbstractCegarLoop]: Abstraction has 1017 states and 1576 transitions. [2020-10-13 14:48:29,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1576 transitions. [2020-10-13 14:48:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:48:29,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:29,023 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 14:48:29,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:48:29,024 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1745921311, now seen corresponding path program 1 times [2020-10-13 14:48:29,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:29,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804319803] [2020-10-13 14:48:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:29,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:29,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:30,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:30,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:48:30,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:30,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1209 [2020-10-13 14:48:30,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:48:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:48:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:48:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:30,511 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:30,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:30,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:30,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:30,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:30,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:30,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:48:30,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:30,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:30,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:30,571 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 14:48:30,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804319803] [2020-10-13 14:48:30,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:30,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:48:30,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002281490] [2020-10-13 14:48:30,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:48:30,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:48:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:48:30,574 INFO L87 Difference]: Start difference. First operand 1017 states and 1576 transitions. Second operand 8 states. [2020-10-13 14:48:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:32,212 INFO L93 Difference]: Finished difference Result 5267 states and 8205 transitions. [2020-10-13 14:48:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:48:32,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-13 14:48:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:32,234 INFO L225 Difference]: With dead ends: 5267 [2020-10-13 14:48:32,234 INFO L226 Difference]: Without dead ends: 4289 [2020-10-13 14:48:32,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:48:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2020-10-13 14:48:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 4281. [2020-10-13 14:48:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4281 states. [2020-10-13 14:48:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 6648 transitions. [2020-10-13 14:48:32,493 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 6648 transitions. Word has length 68 [2020-10-13 14:48:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:32,494 INFO L479 AbstractCegarLoop]: Abstraction has 4281 states and 6648 transitions. [2020-10-13 14:48:32,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:48:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 6648 transitions. [2020-10-13 14:48:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:48:32,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:32,496 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] [2020-10-13 14:48:32,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:48:32,496 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1446446297, now seen corresponding path program 1 times [2020-10-13 14:48:32,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:32,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670646621] [2020-10-13 14:48:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:32,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:32,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:33,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:33,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:48:33,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:33,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-13 14:48:33,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:33,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:48:33,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:48:33,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:33,471 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:33,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:33,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:33,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:33,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:33,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:33,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:48:33,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:33,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:33,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:33,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:33,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:33,515 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 14:48:33,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670646621] [2020-10-13 14:48:33,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:33,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:48:33,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299875347] [2020-10-13 14:48:33,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:48:33,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:33,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:48:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:48:33,518 INFO L87 Difference]: Start difference. First operand 4281 states and 6648 transitions. Second operand 4 states. [2020-10-13 14:48:33,699 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 14:48:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:34,815 INFO L93 Difference]: Finished difference Result 11725 states and 18186 transitions. [2020-10-13 14:48:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:48:34,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:48:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:34,853 INFO L225 Difference]: With dead ends: 11725 [2020-10-13 14:48:34,854 INFO L226 Difference]: Without dead ends: 7483 [2020-10-13 14:48:34,864 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 14:48:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7483 states. [2020-10-13 14:48:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7483 to 7481. [2020-10-13 14:48:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7481 states. [2020-10-13 14:48:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 11496 transitions. [2020-10-13 14:48:35,297 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 11496 transitions. Word has length 70 [2020-10-13 14:48:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:35,297 INFO L479 AbstractCegarLoop]: Abstraction has 7481 states and 11496 transitions. [2020-10-13 14:48:35,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 11496 transitions. [2020-10-13 14:48:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:48:35,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:35,299 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] [2020-10-13 14:48:35,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:48:35,299 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:35,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1727717624, now seen corresponding path program 1 times [2020-10-13 14:48:35,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:35,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14001714] [2020-10-13 14:48:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:35,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:35,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:36,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:36,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:48:36,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:48:36,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-13 14:48:36,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:48:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:48:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:48:36,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:36,335 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:36,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:36,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:36,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:36,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:36,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:36,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 14:48:36,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:48:36,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:48:36,428 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 14:48:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14001714] [2020-10-13 14:48:36,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:36,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:36,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251696906] [2020-10-13 14:48:36,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:48:36,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:48:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:36,432 INFO L87 Difference]: Start difference. First operand 7481 states and 11496 transitions. Second operand 6 states. [2020-10-13 14:48:36,645 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-13 14:48:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:37,965 INFO L93 Difference]: Finished difference Result 22237 states and 34154 transitions. [2020-10-13 14:48:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:48:37,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-13 14:48:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:38,031 INFO L225 Difference]: With dead ends: 22237 [2020-10-13 14:48:38,031 INFO L226 Difference]: Without dead ends: 14795 [2020-10-13 14:48:38,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14795 states. [2020-10-13 14:48:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14795 to 14793. [2020-10-13 14:48:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14793 states. [2020-10-13 14:48:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14793 states to 14793 states and 22568 transitions. [2020-10-13 14:48:39,001 INFO L78 Accepts]: Start accepts. Automaton has 14793 states and 22568 transitions. Word has length 70 [2020-10-13 14:48:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:39,002 INFO L479 AbstractCegarLoop]: Abstraction has 14793 states and 22568 transitions. [2020-10-13 14:48:39,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:48:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 14793 states and 22568 transitions. [2020-10-13 14:48:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:48:39,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:39,003 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] [2020-10-13 14:48:39,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:48:39,004 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2070156205, now seen corresponding path program 1 times [2020-10-13 14:48:39,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:39,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988663661] [2020-10-13 14:48:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:39,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:39,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:48:39,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:39,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-13 14:48:39,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:39,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:48:39,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:48:39,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:48:39,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:39,439 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:39,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:39,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:39,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:39,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:48:39,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:39,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:39,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:39,475 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 14:48:39,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988663661] [2020-10-13 14:48:39,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:39,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:48:39,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502757818] [2020-10-13 14:48:39,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:48:39,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:39,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:48:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:48:39,479 INFO L87 Difference]: Start difference. First operand 14793 states and 22568 transitions. Second operand 8 states. [2020-10-13 14:48:39,732 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-13 14:48:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:43,420 INFO L93 Difference]: Finished difference Result 75365 states and 115102 transitions. [2020-10-13 14:48:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:48:43,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-13 14:48:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:43,607 INFO L225 Difference]: With dead ends: 75365 [2020-10-13 14:48:43,607 INFO L226 Difference]: Without dead ends: 60611 [2020-10-13 14:48:43,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:48:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60611 states. [2020-10-13 14:48:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60611 to 29545. [2020-10-13 14:48:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29545 states. [2020-10-13 14:48:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29545 states to 29545 states and 44456 transitions. [2020-10-13 14:48:45,848 INFO L78 Accepts]: Start accepts. Automaton has 29545 states and 44456 transitions. Word has length 70 [2020-10-13 14:48:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:45,848 INFO L479 AbstractCegarLoop]: Abstraction has 29545 states and 44456 transitions. [2020-10-13 14:48:45,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:48:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 29545 states and 44456 transitions. [2020-10-13 14:48:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:48:45,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:45,850 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 14:48:45,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:48:45,850 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash -268199795, now seen corresponding path program 1 times [2020-10-13 14:48:45,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:45,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840997705] [2020-10-13 14:48:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:45,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:46,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:48:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-13 14:48:46,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:48:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 14:48:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:48:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:46,244 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:46,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:46,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:46,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:46,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:46,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:48:46,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:46,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:48:46,289 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 14:48:46,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840997705] [2020-10-13 14:48:46,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:46,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:48:46,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235675480] [2020-10-13 14:48:46,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:48:46,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:48:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:48:46,293 INFO L87 Difference]: Start difference. First operand 29545 states and 44456 transitions. Second operand 5 states. [2020-10-13 14:48:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:50,278 INFO L93 Difference]: Finished difference Result 60331 states and 90153 transitions. [2020-10-13 14:48:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:48:50,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-13 14:48:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:50,442 INFO L225 Difference]: With dead ends: 60331 [2020-10-13 14:48:50,442 INFO L226 Difference]: Without dead ends: 60329 [2020-10-13 14:48:50,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:48:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60329 states. [2020-10-13 14:48:52,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60329 to 30825. [2020-10-13 14:48:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30825 states. [2020-10-13 14:48:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30825 states to 30825 states and 45736 transitions. [2020-10-13 14:48:52,754 INFO L78 Accepts]: Start accepts. Automaton has 30825 states and 45736 transitions. Word has length 71 [2020-10-13 14:48:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:52,755 INFO L479 AbstractCegarLoop]: Abstraction has 30825 states and 45736 transitions. [2020-10-13 14:48:52,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:48:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30825 states and 45736 transitions. [2020-10-13 14:48:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:48:52,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:52,756 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 14:48:52,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:48:52,756 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash 285360732, now seen corresponding path program 1 times [2020-10-13 14:48:52,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:52,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608912652] [2020-10-13 14:48:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:52,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:52,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:52,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:48:52,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:52,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 14:48:52,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:48:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:48:52,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:48:52,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:53,052 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:48:53,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:53,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:53,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:53,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:53,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:53,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:48:53,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:53,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:53,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:53,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:53,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:53,090 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 14:48:53,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608912652] [2020-10-13 14:48:53,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:53,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:48:53,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554975818] [2020-10-13 14:48:53,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:48:53,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:53,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:48:53,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:48:53,092 INFO L87 Difference]: Start difference. First operand 30825 states and 45736 transitions. Second operand 4 states. [2020-10-13 14:48:53,256 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 14:48:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:56,671 INFO L93 Difference]: Finished difference Result 75415 states and 111844 transitions. [2020-10-13 14:48:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:48:56,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:48:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:56,747 INFO L225 Difference]: With dead ends: 75415 [2020-10-13 14:48:56,747 INFO L226 Difference]: Without dead ends: 44629 [2020-10-13 14:48:56,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:48:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44629 states. [2020-10-13 14:48:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44629 to 44339. [2020-10-13 14:48:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44339 states. [2020-10-13 14:48:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44339 states to 44339 states and 65282 transitions. [2020-10-13 14:48:59,375 INFO L78 Accepts]: Start accepts. Automaton has 44339 states and 65282 transitions. Word has length 72 [2020-10-13 14:48:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:59,376 INFO L479 AbstractCegarLoop]: Abstraction has 44339 states and 65282 transitions. [2020-10-13 14:48:59,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:48:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 44339 states and 65282 transitions. [2020-10-13 14:48:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:48:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:59,400 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] [2020-10-13 14:48:59,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:48:59,400 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash 487013791, now seen corresponding path program 1 times [2020-10-13 14:48:59,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:59,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278241002] [2020-10-13 14:48:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:59,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:00,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:03,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:03,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:49:03,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:49:03,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4479 [2020-10-13 14:49:03,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:03,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:03,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:49:03,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:49:03,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:04,171 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:49:04,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:04,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:04,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:04,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:04,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:04,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:49:04,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:04,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:04,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:04,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:04,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:04,223 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 14:49:04,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278241002] [2020-10-13 14:49:04,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:04,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:04,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143670301] [2020-10-13 14:49:04,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:04,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:04,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:04,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:04,226 INFO L87 Difference]: Start difference. First operand 44339 states and 65282 transitions. Second operand 4 states. [2020-10-13 14:49:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:07,553 INFO L93 Difference]: Finished difference Result 75314 states and 111232 transitions. [2020-10-13 14:49:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:49:07,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-13 14:49:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:07,593 INFO L225 Difference]: With dead ends: 75314 [2020-10-13 14:49:07,593 INFO L226 Difference]: Without dead ends: 31016 [2020-10-13 14:49:07,633 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 14:49:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31016 states. [2020-10-13 14:49:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31016 to 31014. [2020-10-13 14:49:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31014 states. [2020-10-13 14:49:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31014 states to 31014 states and 45665 transitions. [2020-10-13 14:49:09,168 INFO L78 Accepts]: Start accepts. Automaton has 31014 states and 45665 transitions. Word has length 98 [2020-10-13 14:49:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:09,169 INFO L479 AbstractCegarLoop]: Abstraction has 31014 states and 45665 transitions. [2020-10-13 14:49:09,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 31014 states and 45665 transitions. [2020-10-13 14:49:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:49:09,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:09,181 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] [2020-10-13 14:49:09,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:49:09,183 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1973193221, now seen corresponding path program 1 times [2020-10-13 14:49:09,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:09,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361988124] [2020-10-13 14:49:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:09,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:09,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:10,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:10,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:49:10,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:10,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-13 14:49:10,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:10,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:49:10,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:49:10,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 14:49:10,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:10,910 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:49:10,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:10,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:10,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:10,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:49:10,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:10,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:10,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:10,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361988124] [2020-10-13 14:49:10,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:49:10,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:49:10,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721736130] [2020-10-13 14:49:10,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:49:10,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:10,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:49:10,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:49:10,954 INFO L87 Difference]: Start difference. First operand 31014 states and 45665 transitions. Second operand 9 states. [2020-10-13 14:49:11,181 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:49:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:25,500 INFO L93 Difference]: Finished difference Result 175291 states and 256302 transitions. [2020-10-13 14:49:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:49:25,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2020-10-13 14:49:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:25,663 INFO L225 Difference]: With dead ends: 175291 [2020-10-13 14:49:25,663 INFO L226 Difference]: Without dead ends: 150169 [2020-10-13 14:49:25,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:49:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150169 states. [2020-10-13 14:49:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150169 to 51693. [2020-10-13 14:49:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51693 states. [2020-10-13 14:49:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51693 states to 51693 states and 75766 transitions. [2020-10-13 14:49:29,796 INFO L78 Accepts]: Start accepts. Automaton has 51693 states and 75766 transitions. Word has length 99 [2020-10-13 14:49:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:29,797 INFO L479 AbstractCegarLoop]: Abstraction has 51693 states and 75766 transitions. [2020-10-13 14:49:29,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:49:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 51693 states and 75766 transitions. [2020-10-13 14:49:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:49:29,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:29,806 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] [2020-10-13 14:49:29,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:49:29,807 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1609598318, now seen corresponding path program 1 times [2020-10-13 14:49:29,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:29,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366669138] [2020-10-13 14:49:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:30,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:30,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:49:30,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:49:30,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-13 14:49:30,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:30,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:49:30,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:49:30,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 14:49:30,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:30,384 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:49:30,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:30,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:30,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:30,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:30,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:30,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:49:30,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:49:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 14:49:30,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366669138] [2020-10-13 14:49:30,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:30,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:49:30,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698811646] [2020-10-13 14:49:30,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:49:30,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:49:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:49:30,435 INFO L87 Difference]: Start difference. First operand 51693 states and 75766 transitions. Second operand 6 states. [2020-10-13 14:49:30,612 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:39,521 INFO L93 Difference]: Finished difference Result 153879 states and 225210 transitions. [2020-10-13 14:49:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:49:39,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-13 14:49:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:39,642 INFO L225 Difference]: With dead ends: 153879 [2020-10-13 14:49:39,642 INFO L226 Difference]: Without dead ends: 102287 [2020-10-13 14:49:39,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:49:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102287 states. [2020-10-13 14:49:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102287 to 102285. [2020-10-13 14:49:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102285 states. [2020-10-13 14:49:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102285 states to 102285 states and 148800 transitions. [2020-10-13 14:49:47,296 INFO L78 Accepts]: Start accepts. Automaton has 102285 states and 148800 transitions. Word has length 99 [2020-10-13 14:49:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:47,296 INFO L479 AbstractCegarLoop]: Abstraction has 102285 states and 148800 transitions. [2020-10-13 14:49:47,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:49:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 102285 states and 148800 transitions. [2020-10-13 14:49:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:49:47,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:47,307 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] [2020-10-13 14:49:47,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:49:47,308 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:47,308 INFO L82 PathProgramCache]: Analyzing trace with hash 83103799, now seen corresponding path program 1 times [2020-10-13 14:49:47,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:47,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5596321] [2020-10-13 14:49:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:47,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:48,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:48,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:49:48,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:48,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-13 14:49:48,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:49:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:49:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 14:49:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:48,727 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 25 [2020-10-13 14:49:48,897 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:49:48,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:48,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:48,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:48,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:48,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:49:48,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:48,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5596321] [2020-10-13 14:49:48,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:49:48,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:49:48,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491070599] [2020-10-13 14:49:48,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:49:48,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:49:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:49:48,940 INFO L87 Difference]: Start difference. First operand 102285 states and 148800 transitions. Second operand 9 states. [2020-10-13 14:49:49,156 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:50:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:33,203 INFO L93 Difference]: Finished difference Result 502983 states and 725670 transitions. [2020-10-13 14:50:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:50:33,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2020-10-13 14:50:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:33,861 INFO L225 Difference]: With dead ends: 502983 [2020-10-13 14:50:33,861 INFO L226 Difference]: Without dead ends: 437381 [2020-10-13 14:50:33,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:50:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437381 states. [2020-10-13 14:50:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437381 to 167451. [2020-10-13 14:50:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167451 states. [2020-10-13 14:50:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167451 states to 167451 states and 242734 transitions. [2020-10-13 14:50:55,695 INFO L78 Accepts]: Start accepts. Automaton has 167451 states and 242734 transitions. Word has length 99 [2020-10-13 14:50:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:55,695 INFO L479 AbstractCegarLoop]: Abstraction has 167451 states and 242734 transitions. [2020-10-13 14:50:55,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:50:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 167451 states and 242734 transitions. [2020-10-13 14:50:55,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:50:55,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:55,707 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] [2020-10-13 14:50:55,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:50:55,707 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 585838738, now seen corresponding path program 1 times [2020-10-13 14:50:55,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:55,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562650469] [2020-10-13 14:50:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:55,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:56,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:56,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:50:56,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:56,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-13 14:50:56,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:50:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:50:56,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:50:56,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:56,530 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:50:56,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:56,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:56,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:56,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:56,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:50:56,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:50:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:50:56,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562650469] [2020-10-13 14:50:56,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:56,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:56,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611627818] [2020-10-13 14:50:56,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:50:56,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:50:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:56,567 INFO L87 Difference]: Start difference. First operand 167451 states and 242734 transitions. Second operand 6 states. [2020-10-13 14:50:56,750 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:51:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:31,747 INFO L93 Difference]: Finished difference Result 499984 states and 723981 transitions. [2020-10-13 14:51:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:51:31,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-13 14:51:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:32,235 INFO L225 Difference]: With dead ends: 499984 [2020-10-13 14:51:32,236 INFO L226 Difference]: Without dead ends: 332825 [2020-10-13 14:51:32,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:51:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332825 states.