/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/array-fpi/sina5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:11:34,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:11:34,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:11:34,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:11:34,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:11:34,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:11:34,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:11:34,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:11:34,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:11:34,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:11:34,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:11:34,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:11:34,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:11:34,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:11:34,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:11:34,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:11:34,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:11:34,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:11:34,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:11:34,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:11:34,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:11:34,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:11:34,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:11:34,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:11:34,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:11:34,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:11:34,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:11:34,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:11:34,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:11:34,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:11:34,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:11:34,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:11:34,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:11:34,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:11:34,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:11:34,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:11:34,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:11:34,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:11:34,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:11:34,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:11:34,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:11:34,923 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 05:11:34,961 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:11:34,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:11:34,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:11:34,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:11:34,963 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:11:34,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:11:34,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:11:34,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:11:34,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:11:34,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:11:34,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:11:34,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:11:34,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:11:34,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:11:34,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:11:34,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:11:34,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:11:34,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:11:34,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:11:34,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:11:34,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:11:34,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:11:34,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:11:34,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:11:34,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:11:34,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:11:34,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:11:34,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:11:34,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:11:34,968 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 05:11:35,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:11:35,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:11:35,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:11:35,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:11:35,314 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:11:35,315 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina5.c [2020-10-13 05:11:35,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11775a048/39ac2ab5a0444ecfa9bd5a6e64db34bb/FLAGb85707b31 [2020-10-13 05:11:35,814 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:11:35,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina5.c [2020-10-13 05:11:35,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11775a048/39ac2ab5a0444ecfa9bd5a6e64db34bb/FLAGb85707b31 [2020-10-13 05:11:36,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11775a048/39ac2ab5a0444ecfa9bd5a6e64db34bb [2020-10-13 05:11:36,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:11:36,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:11:36,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:11:36,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:11:36,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:11:36,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7ea157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36, skipping insertion in model container [2020-10-13 05:11:36,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:11:36,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:11:36,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:11:36,446 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:11:36,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:11:36,606 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:11:36,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36 WrapperNode [2020-10-13 05:11:36,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:11:36,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:11:36,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:11:36,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:11:36,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (1/1) ... [2020-10-13 05:11:36,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:11:36,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:11:36,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:11:36,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:11:36,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (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 05:11:36,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:11:36,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:11:36,759 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:11:36,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:11:36,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:11:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:11:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:11:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:11:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:11:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:11:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:11:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:11:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:11:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:11:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:11:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:11:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:11:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:11:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:11:37,083 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:11:37,084 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 05:11:37,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:11:37 BoogieIcfgContainer [2020-10-13 05:11:37,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:11:37,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:11:37,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:11:37,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:11:37,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:11:36" (1/3) ... [2020-10-13 05:11:37,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a642557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:11:37, skipping insertion in model container [2020-10-13 05:11:37,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:36" (2/3) ... [2020-10-13 05:11:37,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a642557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:11:37, skipping insertion in model container [2020-10-13 05:11:37,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:11:37" (3/3) ... [2020-10-13 05:11:37,096 INFO L109 eAbstractionObserver]: Analyzing ICFG sina5.c [2020-10-13 05:11:37,106 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:11:37,113 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:11:37,128 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:11:37,152 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:11:37,152 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:11:37,152 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:11:37,152 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:11:37,153 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:11:37,153 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:11:37,153 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:11:37,153 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:11:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-13 05:11:37,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 05:11:37,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:37,181 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] [2020-10-13 05:11:37,181 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1994596369, now seen corresponding path program 1 times [2020-10-13 05:11:37,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:37,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443310865] [2020-10-13 05:11:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:38,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:11:38,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:11:38,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-13 05:11:38,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 05:11:38,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:38,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:11:38,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:38,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:38,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:38,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:11:38,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:38,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:38,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:38,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:38,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:38,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:38,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:38,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:38,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:38,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:38,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:38,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:38,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:38,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:38,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:38,600 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 05:11:38,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443310865] [2020-10-13 05:11:38,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:11:38,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:11:38,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250518623] [2020-10-13 05:11:38,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:11:38,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:38,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:11:38,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:11:38,628 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-13 05:11:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:38,822 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-10-13 05:11:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:11:38,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 05:11:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:38,843 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:11:38,844 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:11:38,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:11:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:11:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 05:11:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 05:11:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-13 05:11:38,903 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 28 [2020-10-13 05:11:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:38,904 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-13 05:11:38,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:11:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-13 05:11:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 05:11:38,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:38,907 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] [2020-10-13 05:11:38,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:11:38,911 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1530390023, now seen corresponding path program 1 times [2020-10-13 05:11:38,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:38,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092481423] [2020-10-13 05:11:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:38,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:11:41,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:11:41,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2262 [2020-10-13 05:11:41,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:11:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:11:41,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:11:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:41,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:41,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:41,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:41,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:41,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:41,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:41,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:41,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:41,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:41,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,261 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 05:11:41,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092481423] [2020-10-13 05:11:41,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:11:41,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:11:41,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272744631] [2020-10-13 05:11:41,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:11:41,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:11:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:11:41,266 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-13 05:11:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:41,516 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2020-10-13 05:11:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:11:41,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-13 05:11:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:41,520 INFO L225 Difference]: With dead ends: 84 [2020-10-13 05:11:41,521 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 05:11:41,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:11:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 05:11:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-10-13 05:11:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:11:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-13 05:11:41,536 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 28 [2020-10-13 05:11:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:41,536 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-13 05:11:41,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:11:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-13 05:11:41,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:11:41,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:41,539 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] [2020-10-13 05:11:41,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:11:41,539 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:41,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1357692925, now seen corresponding path program 1 times [2020-10-13 05:11:41,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:41,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402886010] [2020-10-13 05:11:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:42,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:42,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:42,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:42,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:46,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:11:46,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:11:46,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:11:46,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:11:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:46,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:11:46,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:47,083 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-13 05:11:48,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:48,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:48,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:48,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:48,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:48,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:48,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:48,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:11:48,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:48,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:48,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:48,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:48,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:48,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:48,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:48,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402886010] [2020-10-13 05:11:48,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:48,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:11:48,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173637141] [2020-10-13 05:11:48,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:11:48,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:11:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:11:48,250 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 22 states. [2020-10-13 05:11:49,445 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-13 05:11:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:50,145 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-13 05:11:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:11:50,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-10-13 05:11:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:50,148 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:11:50,148 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 05:11:50,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:11:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 05:11:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-13 05:11:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:11:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 05:11:50,162 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 38 [2020-10-13 05:11:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:50,162 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 05:11:50,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:11:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 05:11:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:11:50,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:50,164 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:50,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:11:50,165 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1439319237, now seen corresponding path program 2 times [2020-10-13 05:11:50,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:50,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896425497] [2020-10-13 05:11:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:50,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:55,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:11:55,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:11:55,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:11:55,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:55,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:11:55,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:11:55,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:11:55,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:55,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:55,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:55,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:55,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:55,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:55,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:55,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:55,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:55,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:55,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:55,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:55,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:55,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:55,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:55,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:55,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:11:55,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896425497] [2020-10-13 05:11:55,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:55,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:11:55,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808689068] [2020-10-13 05:11:55,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:11:55,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:55,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:11:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:11:55,253 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 8 states. [2020-10-13 05:11:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:55,516 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-13 05:11:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:11:55,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-13 05:11:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:55,518 INFO L225 Difference]: With dead ends: 155 [2020-10-13 05:11:55,518 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 05:11:55,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:11:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 05:11:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2020-10-13 05:11:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:11:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 05:11:55,531 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 40 [2020-10-13 05:11:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:55,531 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 05:11:55,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:11:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 05:11:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 05:11:55,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:55,533 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:55,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:11:55,533 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2067438587, now seen corresponding path program 3 times [2020-10-13 05:11:55,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:55,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153443870] [2020-10-13 05:11:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:55,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:00,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 05:12:00,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:12:00,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:12:00,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:12:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:12:00,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:00,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:00,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:00,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:00,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:00,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:00,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:00,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:00,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:00,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:00,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:00,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:00,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:00,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:00,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:00,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:12:00,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153443870] [2020-10-13 05:12:00,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:00,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:12:00,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613499102] [2020-10-13 05:12:00,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:12:00,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:12:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:12:00,617 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2020-10-13 05:12:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:00,842 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-10-13 05:12:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:12:00,843 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-13 05:12:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:00,844 INFO L225 Difference]: With dead ends: 77 [2020-10-13 05:12:00,844 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:12:00,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:12:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:12:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-13 05:12:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:12:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-13 05:12:00,855 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2020-10-13 05:12:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:00,855 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-13 05:12:00,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:12:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-13 05:12:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:12:00,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:00,860 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] [2020-10-13 05:12:00,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:12:00,861 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash 604298867, now seen corresponding path program 4 times [2020-10-13 05:12:00,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:00,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91239546] [2020-10-13 05:12:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:01,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:05,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:12:05,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:12:05,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-13 05:12:05,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:05,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:12:05,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:12:05,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:07,108 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-13 05:12:07,397 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-13 05:12:07,716 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-13 05:12:08,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:08,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:08,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:08,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:08,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:08,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:08,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:08,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:08,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:08,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:08,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:08,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:08,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:08,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:08,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:08,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:08,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91239546] [2020-10-13 05:12:08,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:08,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:12:08,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091336186] [2020-10-13 05:12:08,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:12:08,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:12:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:12:08,770 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 31 states. [2020-10-13 05:12:09,572 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-13 05:12:10,047 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2020-10-13 05:12:10,281 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-13 05:12:10,481 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-13 05:12:10,770 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-10-13 05:12:11,156 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-13 05:12:11,411 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-13 05:12:11,599 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-13 05:12:11,789 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-13 05:12:12,135 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-13 05:12:12,690 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-13 05:12:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:13,891 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2020-10-13 05:12:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:12:13,894 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 48 [2020-10-13 05:12:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:13,895 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:12:13,895 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 05:12:13,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 05:12:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 05:12:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2020-10-13 05:12:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:12:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-13 05:12:13,909 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 48 [2020-10-13 05:12:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:13,910 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-13 05:12:13,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:12:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-13 05:12:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:12:13,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:13,911 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 05:12:13,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:12:13,912 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash 701039665, now seen corresponding path program 5 times [2020-10-13 05:12:13,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:13,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731808792] [2020-10-13 05:12:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:13,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:18,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:12:18,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:12:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:12:18,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:12:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:12:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:12:18,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:18,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:18,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:18,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:18,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:18,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:18,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:18,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:18,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:18,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:18,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:18,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:18,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:12:18,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731808792] [2020-10-13 05:12:18,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:18,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:12:18,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894444758] [2020-10-13 05:12:18,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:12:18,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:12:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:12:19,000 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 10 states. [2020-10-13 05:12:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:19,385 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-10-13 05:12:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:12:19,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-13 05:12:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:19,393 INFO L225 Difference]: With dead ends: 185 [2020-10-13 05:12:19,393 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 05:12:19,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 05:12:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-13 05:12:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 05:12:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2020-10-13 05:12:19,424 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 50 [2020-10-13 05:12:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:19,424 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2020-10-13 05:12:19,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:12:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2020-10-13 05:12:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:12:19,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:19,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-13 05:12:19,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:12:19,432 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -926266707, now seen corresponding path program 6 times [2020-10-13 05:12:19,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:19,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295992724] [2020-10-13 05:12:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:19,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:24,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:12:24,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:12:24,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:12:24,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:24,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:12:24,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:12:24,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:12:24,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:24,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:24,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:24,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:24,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:24,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:24,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:24,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:24,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:24,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:24,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:24,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:24,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:12:24,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295992724] [2020-10-13 05:12:24,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:24,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:12:24,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560594991] [2020-10-13 05:12:24,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:12:24,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:24,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:12:24,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:12:24,527 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 10 states. [2020-10-13 05:12:25,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:25,067 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2020-10-13 05:12:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:12:25,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 05:12:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:25,070 INFO L225 Difference]: With dead ends: 157 [2020-10-13 05:12:25,070 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 05:12:25,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:12:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 05:12:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2020-10-13 05:12:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 05:12:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-13 05:12:25,100 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 54 [2020-10-13 05:12:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:25,101 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-13 05:12:25,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:12:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-13 05:12:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:12:25,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:25,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:25,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:12:25,103 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1394873015, now seen corresponding path program 1 times [2020-10-13 05:12:25,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:25,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783799775] [2020-10-13 05:12:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:25,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:25,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:26,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:30,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:30,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:30,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:12:30,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:12:30,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-13 05:12:30,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:30,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:12:30,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:12:30,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:12:30,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:31,724 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 29 [2020-10-13 05:12:32,053 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 31 [2020-10-13 05:12:32,374 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 32 [2020-10-13 05:12:32,579 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 30 [2020-10-13 05:12:32,807 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 30 [2020-10-13 05:12:33,280 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 36 [2020-10-13 05:12:35,645 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 293 DAG size of output: 121 [2020-10-13 05:12:39,285 WARN L193 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 309 DAG size of output: 117 [2020-10-13 05:12:41,244 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 334 DAG size of output: 113 [2020-10-13 05:12:43,589 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 364 DAG size of output: 141 [2020-10-13 05:12:45,358 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 320 DAG size of output: 122 [2020-10-13 05:12:47,143 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 269 DAG size of output: 106 [2020-10-13 05:12:48,364 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 203 DAG size of output: 50 [2020-10-13 05:12:49,770 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 232 DAG size of output: 70 [2020-10-13 05:12:50,467 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 34 [2020-10-13 05:12:50,961 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 32 [2020-10-13 05:12:51,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:51,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:51,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:51,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:51,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:51,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:51,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:51,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:51,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:51,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:51,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:51,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:51,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:51,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:51,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:51,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:51,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:51,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 05:12:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:51,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:51,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:51,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:51,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:12:51,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:12:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:12:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:51,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783799775] [2020-10-13 05:12:51,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:51,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:12:51,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218015991] [2020-10-13 05:12:51,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:12:51,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:51,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:12:51,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:12:51,869 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 35 states. [2020-10-13 05:12:52,136 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 3 [2020-10-13 05:12:52,476 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 15 [2020-10-13 05:12:54,003 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 46 [2020-10-13 05:12:55,537 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 199 DAG size of output: 146 [2020-10-13 05:12:57,094 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2020-10-13 05:12:58,988 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 281 DAG size of output: 149 [2020-10-13 05:13:00,470 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 196 DAG size of output: 157 [2020-10-13 05:13:01,387 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 125 [2020-10-13 05:13:02,130 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-10-13 05:13:04,914 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 248 DAG size of output: 215 [2020-10-13 05:13:05,996 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-10-13 05:13:06,970 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 117 [2020-10-13 05:13:07,360 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-13 05:13:10,628 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 231 DAG size of output: 210 [2020-10-13 05:13:11,364 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 110 [2020-10-13 05:13:12,227 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2020-10-13 05:13:12,633 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-13 05:13:13,127 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-13 05:13:14,683 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 232 DAG size of output: 102 [2020-10-13 05:13:16,226 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 244 DAG size of output: 109 [2020-10-13 05:13:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:16,869 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-10-13 05:13:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 05:13:16,869 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2020-10-13 05:13:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:16,871 INFO L225 Difference]: With dead ends: 111 [2020-10-13 05:13:16,871 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 05:13:16,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=590, Invalid=6216, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 05:13:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 05:13:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2020-10-13 05:13:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:13:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-13 05:13:16,881 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 56 [2020-10-13 05:13:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:16,881 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-13 05:13:16,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:13:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-13 05:13:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:13:16,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:16,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 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 05:13:16,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:13:16,883 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:16,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2023972503, now seen corresponding path program 7 times [2020-10-13 05:13:16,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:16,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818904745] [2020-10-13 05:13:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:19,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:21,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:13:21,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:13:21,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:13:21,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:21,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:13:21,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:21,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:13:21,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:22,436 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-13 05:13:22,931 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 05:13:23,097 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-13 05:13:23,258 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-13 05:13:23,433 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 05:13:23,598 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-13 05:13:23,784 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-13 05:13:23,967 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-13 05:13:24,232 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-13 05:13:24,447 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-13 05:13:24,760 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-10-13 05:13:24,978 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-13 05:13:25,204 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-13 05:13:25,699 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-13 05:13:26,100 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-13 05:13:27,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:27,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:27,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:27,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:27,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:27,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:27,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:27,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:27,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:27,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:27,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:27,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818904745] [2020-10-13 05:13:27,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:27,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:13:27,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520744076] [2020-10-13 05:13:27,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:13:27,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:13:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:13:27,787 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 41 states. [2020-10-13 05:13:28,581 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 69 [2020-10-13 05:13:29,088 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 66 [2020-10-13 05:13:29,607 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 68 [2020-10-13 05:13:29,999 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 67 [2020-10-13 05:13:30,520 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2020-10-13 05:13:30,902 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-13 05:13:31,409 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-13 05:13:31,918 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-10-13 05:13:32,371 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 82 [2020-10-13 05:13:32,853 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-10-13 05:13:33,304 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 81 [2020-10-13 05:13:33,970 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 91 [2020-10-13 05:13:34,379 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 80 [2020-10-13 05:13:34,819 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 82 [2020-10-13 05:13:35,135 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 56 [2020-10-13 05:13:35,563 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 80 [2020-10-13 05:13:35,910 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 68 [2020-10-13 05:13:36,352 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 81 [2020-10-13 05:13:36,813 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 83 [2020-10-13 05:13:37,016 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 15 [2020-10-13 05:13:37,448 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 73 [2020-10-13 05:13:37,765 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-13 05:13:38,098 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 59 [2020-10-13 05:13:38,335 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-13 05:13:38,681 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-13 05:13:39,393 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-13 05:13:40,250 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 56 [2020-10-13 05:13:40,702 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 67 [2020-10-13 05:13:41,123 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 62 [2020-10-13 05:13:41,436 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 36 [2020-10-13 05:13:41,792 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 38 [2020-10-13 05:13:42,565 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 63 [2020-10-13 05:13:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:42,750 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2020-10-13 05:13:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 05:13:42,752 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-13 05:13:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:42,753 INFO L225 Difference]: With dead ends: 144 [2020-10-13 05:13:42,754 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 05:13:42,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=1072, Invalid=5734, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 05:13:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 05:13:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 114. [2020-10-13 05:13:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 05:13:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-10-13 05:13:42,776 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 58 [2020-10-13 05:13:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:42,776 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-10-13 05:13:42,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:13:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-10-13 05:13:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:13:42,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:42,777 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 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 05:13:42,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:13:42,777 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -909586009, now seen corresponding path program 8 times [2020-10-13 05:13:42,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:42,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020528243] [2020-10-13 05:13:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:42,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:43,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:47,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:13:47,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:13:47,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:13:47,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:13:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:13:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:13:47,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:47,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:47,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:47,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:47,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:47,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:47,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:47,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:47,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:47,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:47,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:47,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:47,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:47,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:47,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:47,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 05:13:47,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020528243] [2020-10-13 05:13:47,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:47,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:13:47,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922406661] [2020-10-13 05:13:47,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:13:47,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:47,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:13:47,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:13:47,922 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 12 states. [2020-10-13 05:13:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:48,681 INFO L93 Difference]: Finished difference Result 249 states and 281 transitions. [2020-10-13 05:13:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:13:48,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-13 05:13:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:48,684 INFO L225 Difference]: With dead ends: 249 [2020-10-13 05:13:48,684 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 05:13:48,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:13:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 05:13:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 151. [2020-10-13 05:13:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 05:13:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2020-10-13 05:13:48,706 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 60 [2020-10-13 05:13:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:48,706 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2020-10-13 05:13:48,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:13:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2020-10-13 05:13:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:13:48,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:48,708 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 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 05:13:48,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:13:48,708 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash -487419289, now seen corresponding path program 9 times [2020-10-13 05:13:48,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:48,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74774552] [2020-10-13 05:13:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:48,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:49,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:53,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:53,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:13:53,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:13:53,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:13:53,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:13:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:13:53,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:53,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:53,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:53,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:53,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:53,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:53,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:53,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:53,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:53,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:53,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:53,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:53,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:53,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:53,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:53,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:53,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:53,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 05:13:53,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74774552] [2020-10-13 05:13:53,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:53,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:13:53,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714009422] [2020-10-13 05:13:53,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:13:53,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:53,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:13:53,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:13:53,875 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand 12 states. [2020-10-13 05:13:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:55,052 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2020-10-13 05:13:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:13:55,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-13 05:13:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:55,054 INFO L225 Difference]: With dead ends: 180 [2020-10-13 05:13:55,054 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:13:55,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:13:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:13:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2020-10-13 05:13:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 05:13:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-13 05:13:55,070 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 60 [2020-10-13 05:13:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:55,070 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-13 05:13:55,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:13:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-13 05:13:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:13:55,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:55,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-13 05:13:55,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:13:55,071 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 521427519, now seen corresponding path program 2 times [2020-10-13 05:13:55,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:55,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779631343] [2020-10-13 05:13:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:55,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:55,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:57,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:57,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:58,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:59,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:00,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:00,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:14:00,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:14:00,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:14:00,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:00,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:14:00,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:14:00,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:14:00,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:00,884 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-13 05:14:01,030 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-13 05:14:01,211 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-10-13 05:14:01,391 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-10-13 05:14:01,571 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2020-10-13 05:14:01,748 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-13 05:14:01,958 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-13 05:14:02,144 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-13 05:14:02,384 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 57 [2020-10-13 05:14:02,659 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2020-10-13 05:14:02,943 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-10-13 05:14:03,173 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-13 05:14:03,434 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-10-13 05:14:03,697 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-13 05:14:03,925 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-13 05:14:04,233 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-13 05:14:04,486 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2020-10-13 05:14:04,814 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-13 05:14:05,091 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-13 05:14:05,288 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-13 05:14:05,644 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-13 05:14:06,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:06,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:06,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:06,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:06,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:06,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:06,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:06,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:06,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:06,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:06,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:06,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:06,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:06,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:06,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:06,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:06,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:06,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:14:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:06,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:06,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:06,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:06,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:06,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:14:06,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:06,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:14:06,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:06,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:14:06,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:06,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779631343] [2020-10-13 05:14:06,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:06,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:14:06,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217369740] [2020-10-13 05:14:06,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:14:06,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:14:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:14:06,796 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 42 states. [2020-10-13 05:14:08,114 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 05:14:08,438 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-13 05:14:08,726 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-13 05:14:08,929 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-13 05:14:09,311 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 63 [2020-10-13 05:14:09,687 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-13 05:14:09,955 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-13 05:14:10,309 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-13 05:14:10,688 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-13 05:14:11,006 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-13 05:14:11,367 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-10-13 05:14:11,621 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 05:14:12,131 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 77 [2020-10-13 05:14:12,500 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-10-13 05:14:13,005 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-13 05:14:13,294 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-13 05:14:13,795 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-13 05:14:14,642 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 98 [2020-10-13 05:14:14,974 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 60 [2020-10-13 05:14:15,594 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-13 05:14:16,031 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-10-13 05:14:16,302 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-13 05:14:16,711 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 67 [2020-10-13 05:14:16,978 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-13 05:14:17,470 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2020-10-13 05:14:18,107 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 95 [2020-10-13 05:14:18,567 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2020-10-13 05:14:18,988 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-10-13 05:14:19,265 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-13 05:14:19,665 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 58 [2020-10-13 05:14:20,047 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 47 [2020-10-13 05:14:20,442 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-13 05:14:20,785 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-10-13 05:14:21,159 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-13 05:14:21,565 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 72 [2020-10-13 05:14:22,081 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 80 [2020-10-13 05:14:22,350 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 33 [2020-10-13 05:14:22,711 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2020-10-13 05:14:23,121 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2020-10-13 05:14:23,391 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-13 05:14:23,731 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-13 05:14:24,156 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-13 05:14:24,616 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-13 05:14:24,905 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 51 [2020-10-13 05:14:25,616 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2020-10-13 05:14:25,887 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-13 05:14:26,141 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-13 05:14:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:26,283 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2020-10-13 05:14:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 05:14:26,285 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 66 [2020-10-13 05:14:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:26,286 INFO L225 Difference]: With dead ends: 139 [2020-10-13 05:14:26,286 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 05:14:26,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=794, Invalid=8908, Unknown=0, NotChecked=0, Total=9702 [2020-10-13 05:14:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 05:14:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2020-10-13 05:14:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 05:14:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-13 05:14:26,308 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 66 [2020-10-13 05:14:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:26,309 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-13 05:14:26,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:14:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-13 05:14:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:14:26,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:26,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 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 05:14:26,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:14:26,310 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:26,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1680316193, now seen corresponding path program 10 times [2020-10-13 05:14:26,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:26,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780401979] [2020-10-13 05:14:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:26,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:27,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:28,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:31,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:31,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:14:31,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:14:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:14:31,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 05:14:31,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:14:31,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:14:31,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:31,894 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 05:14:32,014 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 05:14:32,162 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-13 05:14:32,287 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-13 05:14:32,493 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-13 05:14:32,680 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-13 05:14:32,862 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-13 05:14:33,211 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-13 05:14:33,464 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-13 05:14:33,799 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2020-10-13 05:14:34,122 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-13 05:14:34,502 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-13 05:14:34,855 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2020-10-13 05:14:35,189 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2020-10-13 05:14:35,543 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-13 05:14:36,110 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 77 [2020-10-13 05:14:36,518 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-13 05:14:37,056 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-13 05:14:37,548 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-13 05:14:37,914 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-13 05:14:38,230 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-10-13 05:14:38,586 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-13 05:14:38,850 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 05:14:39,118 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-13 05:14:39,438 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-13 05:14:39,848 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-13 05:14:42,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:42,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:42,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:42,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:42,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:42,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:42,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:42,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:42,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:42,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:42,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:42,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:42,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:42,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:42,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:42,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:42,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:42,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:42,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780401979] [2020-10-13 05:14:42,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:42,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 05:14:42,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146045765] [2020-10-13 05:14:42,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 05:14:42,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 05:14:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2178, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:14:42,168 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 49 states. [2020-10-13 05:14:42,728 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 34 [2020-10-13 05:14:43,052 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-10-13 05:14:43,382 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 43 [2020-10-13 05:14:44,086 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 90 [2020-10-13 05:14:44,799 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 90 [2020-10-13 05:14:45,852 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 112 [2020-10-13 05:14:46,268 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 52 [2020-10-13 05:14:46,709 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 53 [2020-10-13 05:14:47,133 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 70 [2020-10-13 05:14:47,521 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 59 [2020-10-13 05:14:48,108 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 69 [2020-10-13 05:14:48,594 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 68 [2020-10-13 05:14:49,656 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 107 [2020-10-13 05:14:50,320 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2020-10-13 05:14:51,234 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 93 [2020-10-13 05:14:51,980 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-10-13 05:14:52,485 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2020-10-13 05:14:52,866 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-13 05:14:53,321 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-13 05:14:53,691 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-13 05:14:54,277 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-13 05:14:54,579 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-13 05:14:54,880 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-13 05:14:55,284 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 51 [2020-10-13 05:14:55,730 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 50 [2020-10-13 05:14:56,141 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 44 [2020-10-13 05:14:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:58,311 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2020-10-13 05:14:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 05:14:58,314 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 68 [2020-10-13 05:14:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:58,316 INFO L225 Difference]: With dead ends: 165 [2020-10-13 05:14:58,316 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 05:14:58,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=529, Invalid=6113, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 05:14:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 05:14:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 155. [2020-10-13 05:14:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 05:14:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2020-10-13 05:14:58,338 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 68 [2020-10-13 05:14:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:58,338 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2020-10-13 05:14:58,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 05:14:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2020-10-13 05:14:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:14:58,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:58,339 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 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 05:14:58,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:14:58,339 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1300135011, now seen corresponding path program 11 times [2020-10-13 05:14:58,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:58,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51407082] [2020-10-13 05:14:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:58,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:58,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:59,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:03,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:03,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:15:03,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:15:03,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:15:03,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:15:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 05:15:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:15:03,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:03,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:03,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:03,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:03,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:03,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:03,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:03,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:03,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:03,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:03,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:03,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:03,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:15:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:03,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:03,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:03,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:03,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:03,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:03,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:03,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:03,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:03,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:03,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 05:15:03,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51407082] [2020-10-13 05:15:03,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:03,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:15:03,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768272236] [2020-10-13 05:15:03,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:15:03,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:03,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:15:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:15:03,617 INFO L87 Difference]: Start difference. First operand 155 states and 164 transitions. Second operand 14 states. [2020-10-13 05:15:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:05,199 INFO L93 Difference]: Finished difference Result 314 states and 345 transitions. [2020-10-13 05:15:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:15:05,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-10-13 05:15:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:05,205 INFO L225 Difference]: With dead ends: 314 [2020-10-13 05:15:05,205 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 05:15:05,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:15:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 05:15:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 212. [2020-10-13 05:15:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 05:15:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 226 transitions. [2020-10-13 05:15:05,236 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 226 transitions. Word has length 70 [2020-10-13 05:15:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:05,237 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 226 transitions. [2020-10-13 05:15:05,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:15:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 226 transitions. [2020-10-13 05:15:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:15:05,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:05,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-13 05:15:05,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:15:05,239 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash 818470165, now seen corresponding path program 3 times [2020-10-13 05:15:05,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:05,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408959540] [2020-10-13 05:15:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:05,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:06,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:09,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:09,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:10,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:15:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:15:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-13 05:15:10,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:15:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:15:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 05:15:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:10,749 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-13 05:15:10,872 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-13 05:15:11,044 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 05:15:11,225 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-13 05:15:11,425 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-13 05:15:11,645 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-13 05:15:11,885 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-13 05:15:12,131 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-13 05:15:12,420 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-13 05:15:12,719 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-13 05:15:13,051 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-13 05:15:13,394 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-13 05:15:13,772 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-13 05:15:14,278 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-13 05:15:14,664 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-13 05:15:15,055 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-13 05:15:15,405 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-13 05:15:15,831 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 63 [2020-10-13 05:15:16,209 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-13 05:15:16,595 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2020-10-13 05:15:17,024 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-13 05:15:17,367 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-13 05:15:17,734 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-13 05:15:18,006 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-13 05:15:18,301 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-13 05:15:18,590 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2020-10-13 05:15:18,874 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 05:15:19,343 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-13 05:15:20,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:20,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:20,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:20,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:20,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:20,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:20,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:15:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:20,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:20,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:20,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:20,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:15:20,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:20,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:20,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:20,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:15:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:20,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:20,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:20,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:20,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:20,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:20,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:20,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:20,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:15:20,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:20,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 05:15:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:20,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:20,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:20,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:15:20,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:20,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:20,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:20,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:15:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:15:20,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408959540] [2020-10-13 05:15:20,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:20,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:15:20,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165340497] [2020-10-13 05:15:20,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:15:20,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:20,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:15:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:15:20,617 INFO L87 Difference]: Start difference. First operand 212 states and 226 transitions. Second operand 42 states. [2020-10-13 05:15:22,143 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 43 [2020-10-13 05:15:22,395 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-13 05:15:22,688 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-13 05:15:23,047 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 59 [2020-10-13 05:15:23,396 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 58 [2020-10-13 05:15:23,797 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2020-10-13 05:15:24,216 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 62 [2020-10-13 05:15:24,862 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 60 [2020-10-13 05:15:25,226 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-13 05:15:26,018 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 88 [2020-10-13 05:15:26,590 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 71 [2020-10-13 05:15:27,055 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 69 [2020-10-13 05:15:27,450 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-13 05:15:28,084 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 63